Inborn Metabolic Diseases - Diagnosis and Treatment

Inborn Metabolic Diseases - Diagnosis and Treatment

von: Jean-Marie Saudubray, Matthias R. Baumgartner, John Walter

Springer-Verlag, 2016

ISBN: 9783662497715

Sprache: Englisch

655 Seiten, Download: 7802 KB

 
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Inborn Metabolic Diseases - Diagnosis and Treatment



  Preface to the 6th edition 5  
  Content 6  
  List of Contributors 26  
  Section I Diagnosis and Treatment: General Principles 32  
     1Clinical Approach to Inborn Errors of Metabolism in Pediatrics 33  
        Classification 34  
           Pathophysiology 34  
           Clinical Presentation 35  
        Antenatal Symptoms 36  
        Neonatal and Early Infancy Presentation (<1 year) 38  
           Clinical Presentation 38  
           Metabolic Derangements and Diagnostic Tests 44  
        Later Onset Acute and Recurrent Attacks (Late Infancy and Beyond) 48  
           Clinical Presentations 48  
           Metabolic Derangements and Diagnostic Tests 56  
        Chronic and Progressive Neurological Symptoms (Mental Retardation , Developmental Delay , Epilepsy , Neurological Deterioration 62  
           Diagnostic Approach to Neurological and Mental Deterioration Related to Age 62  
           Specific Neurosensorial, Neuro-physiological and Neuroradiological Signs and Symptoms (at any Age) 75  
           Recommended Laboratory Tests in Neurological Syndromes 82  
        Specific Organ Signs and Symptoms 85  
           Cardiology 85  
           Dermatology 85  
           Endocrinology (. Table 1.34) 87  
           Gastroenterology and Nutritional Findings 88  
           Haematology 91  
           Hepatology 93  
           Immunology (see also 94  
           Section 1.6 Neutropenia) 94  
           Myology 95  
           Nephrology (. Table 1.39) 95  
           Neurology and Psychiatry 95  
           Ophthalmologic Signs 95  
           Orthopedy (. Table 1.42) 96  
           Pneumology 98  
           Psychiatry 98  
           Rheumatology 98  
           Stomatology 99  
        References 99  
     2Inborn Errors of Metabolism in Adults : A Diagnostic Approach to Neurological and Psychiatric Presentations 101  
        Differences Between Paediatric and Adult Phenotypes 102  
        General Approach to IEM in Adulthood 102  
           Disorders of Energy Metabolism 102  
           Disorders of Lipid Metabolism 102  
           Intoxication Syndromes 105  
           Disorders of Neurotransmitter Metabolism 106  
           Metal Storage Disorders 106  
        Specific Approaches to Neuro-metabolic Presentations in Adults 106  
           Encephalopathies /Coma s 106  
           Strokes and Pseudostrokes 107  
           Movement Disorders 107  
           Peripheral Neuropathies 107  
           Leukoencephalopathies 109  
           Epilepsy 111  
           Psychiatric Disorders 112  
           Spastic Paraparesis 114  
           Cerebellar Ataxia 114  
           Myopathy 115  
           Others 117  
        References 119  
     3Diagnostic Procedures 120  
        Introduction 121  
        Basal Metabolic Investigation 121  
           Amino and organic acids 121  
           Metabolic Profile over the Course of the Day 121  
        Metabolomic Approaches :the Example of In Vitro 1H-NMRSpectroscopy of Body Fluids 129  
        Functional Tests 130  
           Fasting Test 130  
           Oral Glucose Loading Test 132  
           Glucagon Test 132  
           Protein and Allopurinol Loading Test 132  
           Exercise Test 133  
        Next Generation Sequencing and Gene panels 133  
        Postmortem Protocol 134  
           Cells and Tissues for Enzyme Assays 134  
           Cells and Tissues for Chromosome and DNA Investigations 134  
           Skin Fibroblasts 134  
           Body Fluids for Chemical Investigations 134  
           Autopsy 135  
        References 136  
     4Emergency Treatments 137  
        Introduction 138  
        General Principles 138  
           Supportive Care 138  
           Nutrition 138  
           Specific Therapies 138  
           Extracorporeal Procedures for Toxin Removal 138  
        Emergency Management of Particular Clinical Presentations 139  
           Neurological Deterioration 139  
           Liver Failure 142  
           Neonatal Hypoglycaemia 142  
           Cardiac Failure 143  
           Primary Hyperlactataemia 143  
           Intractable Seizures 143  
        Final Considerations 143  
        References 143  
  Section II Disorders of Carbohydrate Metabolism 146  
     5The Glycogen Storage Diseases and Related Disorders 147  
        Hepatic Glycogenoses 149  
           Liver Glycogen Storage Disease Type 0 (GSD 0a) 149  
           Glycogen Storage Disease Type I(GSD I) 149  
           Glycogen Storage Disease Type III (GSD III) 153  
           Glycogen Storage Disease Type IV (GSD IV) 154  
           Glycogen Storage Disease Type VI (GSD VI) 155  
           Glycogen storage disease type IX (GSD IX) 155  
           Fanconi-Bickel Syndrome 155  
        Muscle and Cardiac Glycogenoses 156  
           Glycogen Storage Disease Type V (Myophosphorylase Deficiency , McArdle Disease ) 156  
           Disorders of Glycolysis 157  
           Glycogen Storage Disease Type II (Pompe Disease ) 157  
           Danon Disease (LAMP-2 Deficiency ) 158  
           Glycogen Depletion Syndromes : Muscle Glycogen Synthase Deficiency (Muscle GSD Type 0, GSD 0b) and Glycogenin 1 Deficiency 159  
           Muscle and Cardiac Glycogenosis with Polyglucosan Bodies Due to RBCK1 and GYG1 Mutations 159  
           AMP-activated Protein Kinase (AMPK) Deficiency 160  
        Brain Glycogenoses 160  
           Lafora Disease (Neuronal Laforin/ Malin Defects ) 160  
           Adult Polyglucosan Body Disease 161  
        References 161  
     6Disorders of Galactose Metabolism 164  
        Galactose-1-Phosphate Uridylyl-transferase (GALT) Deficiency 166  
           Clinical Presentation of GALT Deficiency 166  
           Metabolic Derangement in GALT Deficiency 167  
           Genetics of GALT Deficiency 167  
           Diagnostic Tests for GALT Deficiency 167  
           Treatment and Prognosis for GALT Deficiency 168  
        Uridine Diphosphate Galactose 4’-Epimerase (GALE) Deficiency 169  
           Clinical Presentation of GALE Deficiency 169  
           Metabolic Derangement in GALE Deficiency 169  
           Genetics of GALE Deficiency 170  
           Diagnostic Tests for GALE Deficiency 170  
           Treatment and Prognosis for GALE Deficiency 170  
        Galactokinase (GALK) Deficiency 170  
           Clinical Presentation of GALK Deficiency 170  
           Metabolic Derangement in GALK Deficiency 170  
           Genetics of GALK Deficiency 170  
           Diagnostic Tests for GALK Deficiency 171  
           Treatment and Prognosis for GALK Deficiency 171  
        Fanconi-Bickel Syndrome 171  
        Portosystemic Venous Shunting and Hepatic Arteriovenous Malformations 171  
        References 171  
     7Disorders of Glycolysis and the Pentose Phosphate Pathway 173  
        Muscle Phosphofructokinase (PFKM) Deficiency 175  
           Clinical Presentation 175  
           Metabolic Derangement 175  
           Genetics 175  
           Diagnostic Tests 176  
        Aldolase A (ALDOA) Deficiency 176  
           Clinical Presentation 176  
           Metabolic Derangement 176  
           Genetics 176  
           Diagnostic Tests 176  
           Treatment and Prognosis 176  
        Triosephosphate Isomerase (TPI) Deficiency 176  
           Clinical Presentation 176  
           Metabolic Derangement 176  
           Genetics 177  
           Diagnostic Tests 177  
           Treatment and Prognosis 177  
        Phosphoglycerate Kinase (PGK) Deficiency 177  
           Clinical Presentation 177  
           Metabolic Derangement 177  
           Genetics 177  
           Diagnostic Tests 177  
           Treatment and Prognosis 177  
        Phosphoglycerate Mutase (PGAM) Deficiency 178  
           Clinical Presentation 178  
           Metabolic Derangement 178  
           Genetics 178  
           Diagnostic Tests 178  
           Treatment and Prognosis 178  
        Enolase Deficiency 178  
           Clinical Presentation 178  
           Metabolic Derangement 178  
           Genetics 178  
           Diagnostic Tests 178  
           Treatment and Prognosis 179  
        Lactate Dehydrogenase (LDH) Deficiency 179  
           Clinical Presentation 179  
           Metabolic Derangement 179  
           Genetics 179  
           Diagnostic Tests 179  
           Treatment and Prognosis 179  
        Glycerol Kinase Deficiency (GKD) 179  
           Clinical Presentation 179  
           Metabolic Derangement 179  
           Genetics 180  
           Diagnostic Tests 180  
           Treatment and Prognosis 180  
        Ribose-5-Phosphate Isomerase (RPI) Deficiency 180  
           Clinical Presentation 180  
           Metabolic Derangement 180  
           Genetics 181  
           Diagnostic Tests 181  
           Treatment and Prognosis 181  
        Transaldolase (TALDO) Deficiency 181  
           Clinical Presentation 181  
           Metabolic Derangement 181  
           Genetics 181  
           Diagnostic Tests 181  
           Treatment and Prognosis 182  
        Transketolase (TKT) Deficiency 182  
           Clinical Presentation 182  
           Metabolic Derangement 182  
           Genetics 182  
           Diagnostic Tests 182  
           Treatment and Prognosis 182  
        Sedoheptulokinase (SHPK) Deficiency 182  
           Clinical Presentation 182  
           Metabolic Derangement 183  
           Genetics 183  
           Diagnostic Tests 183  
           Treatment and Prognosis 183  
        References 183  
     8Disorders of Fructose Metabolism 185  
        Essential Fructosuria 187  
           Clinical Presentation 187  
           Metabolic Derangement 187  
           Genetics 187  
           Diagnosis 187  
           Treatment and Prognosis 187  
        Hereditary Fructose Intolerance 187  
           Clinical Presentation 187  
           Metabolic Derangement 188  
           Genetics 188  
           Diagnosis 188  
           Differential Diagnosis 189  
           Treatment and Prognosis 189  
        Fructose-1,6-Bisphosphatase Deficiency 189  
           Clinical Presentation 189  
           Metabolic Derangement 190  
           Genetics 190  
           Diagnosis 190  
           Differential Diagnosis 191  
           Treatment and Prognosis 191  
        References 191  
     9Congenital Hyperinsulinism 193  
        Clinical Presentation 195  
        Metabolic Derangement 196  
        Genetics 196  
        Diagnostic Tests 196  
        Treatment and Prognosis 197  
        Long-term Medical Management 198  
        Prognosis 198  
        References 198  
     10Disorders of Glucose Transport 199  
        Congenital Glucose/Galactose Malabsorption (SGLT1 Deficiency ) 201  
           Clinical Presentation 201  
           Metabolic Derangement 201  
           Genetics 201  
           Diagnostic Tests 201  
           Treatment and Prognosis 202  
        Renal Glucosuria (SGLT2 Deficiency ) 202  
           Clinical Presentation 202  
           Metabolic Derangement 202  
           Genetics 202  
           Diagnostic Tests 202  
           Treatment and Prognosis 202  
        Glucose Transporter-1 Deficiency (GLUT1 Deficiency ) 202  
           Clinical Presentation 202  
           Metabolic Derangement 203  
           Genetics 203  
           Diagnostic Tests 203  
           Treatment and Prognosis 203  
        Fanconi-Bickel Syndrome (GLUT2 Deficiency ) 204  
           Clinical Presentation 204  
           Metabolic Derangement 204  
           Genetics 204  
           Diagnostic Tests 204  
           Treatment and Prognosis 205  
        Arterial Tortuosity Syndrome (GLUT10 Deficiency ) 205  
           Clinical Presentation 205  
           Metabolic Derangement 205  
           Genetics 205  
           Diagnostic Tests 205  
           Treatment and Prognosis 205  
        References 206  
  Section III Disorders of Mitochondrial Energy Metabolism 208  
     11Disorders of Pyruvate Metabolism and the Tricarboxylic Acid Cycle 209  
        Pyruvate Carboxylase Deficiency 211  
           Metabolic Derangement 211  
           Clinical Presentation 211  
           Genetics 212  
           Diagnostic Tests 212  
           Treatment and Prognosis 212  
        Phosphoenolpyruvate Carboxykinase Deficiency 214  
        Pyruvate Dehydrogenase Complex Deficiency 214  
           Clinical Presentation 214  
           Metabolic Derangement 215  
           Genetics 215  
           Diagnostic Tests 215  
           Treatment and Prognosis 216  
        Dihydrolipoamide Dehydrogenase Deficiency (DLD) 216  
           Clinical Presentation 216  
           Metabolic Derangement 216  
           Genetics 216  
           Diagnostic Tests 216  
           Treatment and Prognosis 216  
        2-Ketoglutarate Dehydrogenase Complex Deficiency (KDHC) 217  
           Clinical Presentation 217  
           Metabolic Derangement 217  
           Genetics 217  
           Diagnostic Tests 217  
           Treatment and Prognosis 217  
        Fumarase Deficiency 217  
           Clinical Presentation 217  
           Metabolic Derangement 217  
           Genetics 218  
           Diagnostic Tests 218  
           Treatment and Prognosis 218  
        Succinate Dehydrogenase Deficiency 218  
           Clinical Presentation 218  
           Metabolic Derangement 218  
        Other Krebs Cycle Disorders 218  
        Pyruvate Transporter Defect 219  
        Protein-bound lipoic acid defect and defects in cof actors 219  
        References 219  
     12Disorders of Mitochondrial Fatty Acid Oxidation & Riboflavin Metabolism 222  
        Disorders of Mitochondrial Fatty Acid Oxidation 224  
        Clinical Presentations 224  
           Fatty Acid Transport Defects 224  
           Carnitine Cycle Defects 224  
           ß-Oxidation Defects 226  
           Electron Transfer Defects 227  
           Other Potential Defects 227  
        Metabolic Derangement 227  
        Genetics 228  
        Diagnostic Tests 228  
           Abnormal Metabolites 228  
           Studies 230  
           Fasting Studies 230  
           Prenatal Diagnosis 230  
           Newborn Screening 230  
        Treatment and Prognosis 230  
           Management of Acute Illness 230  
           Long Term Dietary Management 230  
           Drug Treatment 231  
           Monitoring 231  
           Prognosis 232  
        Defects of Riboflavin Transport & Metabolism 232  
           Brown-Vialetto-van Laere Syndrome 232  
           RFVT1 Deficiency 233  
           FAD Synthase and Mitochondrial FAD Transporter Deficiencies 233  
        References 233  
     13Disorders of Ketogenesis and Ketolysis 235  
        Ketogenesis Defects 237  
           Clinical Presentation 237  
           Metabolic Derangement 237  
           Genetics 237  
           Diagnostic Tests 237  
           Treatment and Prognosis 238  
        Defects of Ketone Body Utilization or Transport 238  
           Clinical Presentation 238  
           Metabolic Derangement 239  
           Genetics 239  
           Diagnostic Tests 239  
           Treatment and Prognosis 239  
        Cytosolic Acetoacetyl-CoA Thiolase Deficiency 240  
        Ketogenic Diets 240  
        References 240  
     14Disorders of Oxidative Phosphorylation 242  
        Clinical Presentation 244  
           Neonatal and Infantile Presentations 245  
           Presentation in Childhood and Adolescence 249  
           Adult-Onset Disorders 250  
        Metabolic Derangement 250  
        Genetics 251  
           Mitochondrial DNA Mutations 251  
           Nuclear Gene Defects 251  
           Frequency of Mutations 252  
        Diagnostic Tests 252  
           Screening Tests 252  
           Muscle and Other Tissue Biopsies 254  
           Molecular Genetic Investigations 257  
        Treatment and Prognosis 257  
           Treatable Disorders 257  
           Supportive Management 259  
           Vitamin and Cofactor Cocktails 259  
           Experimental Approaches 259  
           Genetic Counselling and Prenatal and Preimplantation Genetic Diagnosis 259  
           Prognosis 259  
        References 260  
     15Creatine Deficiency Syndromes 262  
        Clinical Presentation 264  
           Arginine Glycine Amidinotransferase (AGAT) Deficiency 264  
           Guanidinoacetate Methyltransferase (GAMT) Deficiency 264  
           Creatine Transporter (CRTR) Deficiency 264  
        Metabolic Derangement 264  
        Genetics 265  
        Diagnostic Tests 265  
           Brain MRS 265  
           Metabolite Analysis 265  
           DNA Analysis 265  
           Functional Tests 266  
           Prenatal Diagnosis 266  
           Newborn Screening 266  
        Treatment and Prognosis 266  
           Deficiency 266  
           GAMT Deficiency 266  
           CRTR Deficiency 266  
        References 266  
  Section IV Disorders of Amino Acid Metabolism and Transport 268  
     16Hyperphenylalaninaemia 270  
        Phenylalanine Hydroxylase Deficiency 272  
           Clinical Presentation 272  
           Metabolic Derangement 272  
           Genetics 272  
           Diagnostic Tests 272  
           Treatment and Prognosis 273  
        Maternal PKU 277  
           Clinical Presentation 277  
           Metabolic Derangement 277  
           Treatment and Prognosis 277  
        HPA and Disorders of Biopterin Metabolism 278  
           Clinical Presentation 278  
           Metabolic Derangement 278  
           Genetics 278  
           Diagnostic and Confirmatory Tests 278  
           Treatment and Prognosis 279  
        References 280  
     17Disorders of Tyrosine Metabolism 283  
        Hereditary Tyrosinaemia Type I (Hepatorenal Tyrosinaemia ) 285  
           Clinical Presentation 285  
           Metabolic Derangement 285  
           Genetics 286  
           Diagnostic Tests 286  
           Treatment and Prognosis 287  
        Hereditary Tyrosinaemia Type II (Oculocutaneous Tyrosinaemia , Richner-Hanhart Syndrome ) 288  
           Clinical Presentation 288  
           Metabolic Derangement 288  
           Genetics 289  
           Diagnostic Tests 289  
           Treatment and Prognosis 289  
        Hereditary Tyrosinaemia Type III 289  
           Clinical Presentation 289  
           Metabolic Derangement 289  
           Genetics 289  
           Diagnostic Tests 290  
           Treatment and Prognosis 290  
        Transient Tyrosinaemia 290  
        Alkaptonuria 290  
           Clinical Presentation 290  
           Metabolic Derangement 290  
           Genetics 291  
           Diagnostic Tests 291  
           Treatment and Prognosis 291  
        Hawkinsinuria 291  
           Clinical Presentation 291  
           Metabolic Derangement 291  
           Genetics 291  
           Diagnostic Tests 291  
           Treatment and Prognosis 292  
        References 292  
     18Branched-chain Organic Acidurias /Acidaemias 294  
        Maple Syrup Urine Disease , Isovaleric Aciduria , Propionic Aciduria , Methylmalonic Aciduria 296  
           Clinical Presentation 296  
           Metabolic Derangement 298  
           Genetics 299  
           Diagnostic Tests 300  
           Treatment and Prognosis 300  
        3-Methylcrotonyl Glycinuria 305  
           Clinical Presentation 305  
           Metabolic Derangement 305  
           Genetics 305  
           Diagnostic Tests 306  
           Treatment and Prognosis 306  
        3-Methylglutaconic Aciduria 306  
        Short/Branched Chain Acyl-CoA Dehydrogenase Deficiency 307  
        2-Methyl-3-Hydroxybutyryl-CoA Dehydrogenase Deficiency 307  
        Isobutyryl-CoA Dehydrogenase Deficiency 307  
        3-Hydroxyisobutyric Aciduria 307  
        Malonyl-CoA Decarboxylase Deficiency 308  
        ACSF3 Deficiency 308  
        Enoyl-CoA Hydratase or ECHS1 Deficiency 308  
        References 308  
     19Disorders of the Urea Cycle and Related Enzymes 312  
        Mitochondrial Urea Cycle Disorders 314  
           Clinical Presentation 314  
           Genetics 315  
           Diagnostic Tests 315  
           Metabolic Derangements 315  
           Treatment and Prognosis 317  
        Cytosolic Urea Cycle Disorders 318  
           Clinical Presentation 318  
           Metabolic Derangements 319  
           Genetics 319  
           Diagnostic Tests 319  
           Treatment and Prognosis 320  
        Urea Cycle Mitochondrial Transporter Defects 320  
           Hyperornithinemia , Hyperammonaemia and Homocitrullinuria (HHH) Syndrome 320  
           Citrin Deficiency 320  
        Urea Cycle Defects due to Deficiencies of Ancillary Enzymes 322  
           .1-Pyrroline-5-Carboxylate Synthetase (P5CS) Deficiency 322  
           Carbonic Anhydrase Va (CAVA) Deficiency 322  
        References 323  
     20Disorders of Sulfur Amino Acid Metabolism 326  
        Methionine S-Adenosyltransferase Deficiency (Mudd’s Disease ) 328  
           Clinical Presentation 328  
           Metabolic Derangement 328  
           Genetics 328  
           Diagnostic Tests 328  
           Treatment and Prognosis 330  
        Glycine N-Methyltransferase Deficiency 330  
           Clinical Presentation 330  
           Metabolic Derangement 330  
           Genetics 330  
           Diagnostic Tests 330  
           Treatment and Prognosis 330  
        S-Adenosylhomocysteine Hydrolase Deficiency 330  
           Clinical Presentation 330  
           Metabolic Derangement 330  
           Genetics 330  
           Diagnostic Tests 330  
           Treatment and Prognosis 331  
        Adenosine Kinase Deficiency 331  
        Cystathionine ß-Synthase Deficiency 331  
           Clinical Presentation 331  
           Metabolic Derangement 331  
           Genetics 331  
           Diagnostic Tests 332  
           Treatment and Prognosis 333  
        Cystathionine .-Lyase Deficiency 334  
           Clinical Presentation 334  
           Metabolic Derangement 334  
           Genetics 334  
           Diagnostic Tests 334  
           Treatment and Prognosis 334  
        Molybdenum Cofactor Deficiency 334  
           Clinical Presentation 334  
           Metabolic Derangement 334  
           Genetics 334  
           Diagnostic Tests 334  
           Treatment and Prognosis 334  
        Isolated Sulfite Oxidase Deficiency 335  
           Clinical Presentation 335  
           Metabolic Derangement 335  
           Genetics 335  
           Diagnostic Tests 335  
           Treatment and Prognosis 335  
        Ethylmalonic Encephalopathy 335  
           Clinical Presentation 335  
           Metabolic Derangement 335  
           Genetics 335  
           Diagnostic Tests 335  
           Treatment and Prognosis 335  
        References 336  
     21Disorders of Ornithine and Proline Metabolism 338  
        Hyperornithinaemia Due to Ornithine Aminotransferase Deficiency (Gyrate Atrophy of the Choroid and Retina ) 340  
        Hyperornithinaemia , Hyperammonaemia and Homocitrullinuria (HHH) Syndrome 342  
        .1-Pyrroline-5-Carboxylate Synthetase Deficiency 344  
        .1-Pyrroline-5-Carboxylate Reductase Deficiency 1 (PYCR1) and 2 (PYCR2) 345  
        Proline Oxidase Deficiency (Hyperprolinaemia Type I ) 345  
        .1-Pyrroline-5-Carboxylate Dehydrogenase Deficiency (Hyperprolinaemia Type II) 346  
        Prolidase Deficiency 346  
        Spermine Synthase Deficiency (Snyder Robinson Syndrome ) 347  
        References 347  
     22Cerebral Organic Acid Disorders and Other Disorders of Lysine Catabolism 349  
        Introduction 351  
        Hyperlysinaemia /Saccharopinuria 353  
           Clinical Presentation 353  
           Metabolic Derangement 353  
           Genetics 354  
           Diagnostic Tests 354  
           Treatment and Prognosis 354  
        Hydroxylysinuria 354  
        2-Amino -/2-Oxoadipic Aciduria 354  
           Clinical Presentation 354  
           Metabolic Derangement 354  
           Genetics 355  
           Diagnostic Tests 355  
           Treatment and Prognosis 355  
        Glutaric Aciduria Type I 355  
           Clinical Presentation 355  
           Metabolic Derangement 356  
           Genetics 356  
           Diagnostic Tests 356  
           Treatment and Prognosis 357  
        Glutaric Aciduria Type III 358  
           Clinical Presentation 358  
           Metabolic Derangement 358  
           Genetics 358  
           Diagnostic Tests 358  
           Treatment and Prognosis 358  
        L-2-Hydroxyglutaric Aciduria 358  
           Clinical Presentation 358  
           Metabolic Derangement 359  
           Genetics 359  
           Diagnostic Tests 359  
           Treatment and Prognosis 359  
        D-2-Hydroxyglutaric Aciduria 359  
           Clinical Presentation 359  
           Metabolic Derangement 359  
           Genetics 360  
           Diagnostic Tests 360  
           Treatment and Prognosis 360  
        D-2-/L-2-Hydroxyglutaric Aciduria 360  
           Clinical Presentation 360  
           Metabolic Derangement 360  
           Genetics 360  
           Diagnostic Tests 360  
           Treatment and Prognosis 360  
        N-Acetylaspartic Aciduria (Canavan Disease ) 360  
           Clinical Presentation 360  
           Metabolic Derangement 361  
           Genetics 361  
           Diagnostic Tests 361  
           Treatment and Prognosis 361  
        Aminoacylase 1 Deficiency 361  
           Diagnostic Tests 362  
           Treatment and Prognosis 362  
        Hypoacetylaspartia and AspartateGlutamate Carrier 1 Deficiency 362  
        References 362  
     23Nonketotic Hyperglycinemia (Glycine Encephalopathy ) and Lipoate Deficiency Disorders 365  
        Introduction: Definitions 366  
        Clinical Presentation 367  
           Severe Classic NKH 367  
           Attenuated Classic NKH 367  
           Lipoate Disorders Including Variant NKH 368  
        Metabolic Derangement 368  
        Genetics 369  
        Diagnostic Tests 369  
        Treatment 370  
        Prognosis 371  
        References 371  
     24Disorders of Glutamine , Serine and Asparagine Metabolism 373  
        Glutamine Synthetase Deficiency 375  
        Inborn Errors of Serine Meta bolism 375  
           3-Phosphoglycerate Dehydrogenase Deficiency 375  
           Phosphoserine Aminotransferase Deficiency 376  
           3-Phosphoserine Phosphatase Deficiency 376  
           Brain Serine Transporter Deficiency 376  
           Serine Palmitoyltransferase Defects 377  
        Asparagine Synthetase Deficiency 377  
        References 377  
     25Disorders of Amino Acid Transport at the Cell Membrane 379  
        Cystinuria 381  
           Clinical Presentation 381  
           Metabolic Derangement 381  
           Genetics 381  
           Diagnostic Tests 381  
           Treatment and Prognosis 382  
        Lysinuric Protein Intolerance 383  
           Clinical Presentation 383  
           Metabolic Derangement 383  
           Genetics 384  
           Diagnostic Tests 384  
           Treatment and Prognosis 384  
        Hartnup Disease 385  
           Clinical Presentation 385  
           Metabolic Derangement 385  
           Genetics 385  
           Diagnostic Tests 385  
           Treatment and Prognosis 386  
        Asymptomatic Aminoacidurias: Iminoglycinuria and Dicarboxylic Aminoaciduria 386  
        References 386  
  Section V Vitamin-Responsive Disorders 388  
     26Biotin-responsive Disorders 389  
        Clinical Presentation 391  
           Holocarboxylase Synthetase Deficiency 392  
           Biotinidase Deficiency 392  
        Metabolic Derangement 392  
        Genetics 393  
           Holocarboxylase Synthetase Deficiency 393  
           Biotinidase Deficiency 393  
        Diagnostic Tests 393  
           Holocarboxylase Synthetase Deficiency 394  
           Biotinidase Deficiency 394  
           Acquired Biotin Deficiency 394  
           Prenatal Diagnosis 394  
        Treatment and Prognosis 394  
           Holocarboxylase Synthetase Deficiency 395  
           Biotinidase Deficiency 395  
        References 396  
     27Disorders of Cobalamin and Folate Transport and Metabolism 398  
        Disorders of Absorption and Transport of Cobalamin 400  
           Hereditary Intrinsic Factor Deficiency 400  
           Defective Transport of Cobalamin by Enterocytes (Imerslund-Gräsbeck Syndrome ) 400  
           Haptocorrin (R Binder) Deficiency 401  
           Transcobalamin Deficiency 401  
           Transcobalamin Receptor Deficiency 402  
        Disorders of Intracellular Utilisation of Cobalamin 402  
           Combined Deficiencies of Adenosylcobalamin and Methylcobalamin 402  
           Adenosylcobalamin Deficiency 405  
           Methylcobalamin Deficiency 405  
        Disorders of Absorption and Metabolism of Folate 407  
           Hereditary Folate Malabsorption 407  
           Cerebral Folate Deficiency 407  
           Methylenetetrahydrofolate Dehydrogenase (MTHFD1) Deficiency 408  
           Dihydrofolate Reductase Deficiency 408  
           Glutamate Formiminotransferase Deficiency 409  
           Methylenetetrahydrofolate Reductase Deficiency 409  
        References 410  
     28Disorders of Thiamine and Pyridoxine Metabolism 413  
        Disorders of Thiamine (Vitamin B1) Metabolism 414  
           Thiamine Transporter 1 (THTR1) Deficiency 415  
           Thiamine Transporter 2 (THTR2) Deficiency 416  
           Thiamine Pyrophosphokinase Deficiency 416  
           Mitochondrial TPP Transporter Deficiency 417  
           Thiamine-Responsive a-Ketoacid Dehydrogenase Deficiencies 417  
           Thiamine-Responsive Pyruvate Dehydrogenase Deficiency 417  
           Thiamine-Responsive Maple Syrup Urine Disease 418  
        Vitamin B6 Metabolism 419  
           Antiquitin Deficiency 420  
           Hyperprolinemia Type II 421  
           Pyridox(am)ine 5’-phosphate Oxidase (PNPO) Deficiency 422  
           Congenital Hypophosphatasia 422  
           Hyperphosphatasia-Mental Retardation Syndrome (HPMRS) 422  
           Other B6 Responsive Disorders 422  
        References 423  
  Section VI Neurotransmitter and Small Peptide Disorders 425  
     29Disorders of Neurotransmission 426  
        Inborn Errors of Gamma Amino Butyric Acid Metabolism 428  
           Gamma Amino Butyric Acid Transaminase Deficiency 428  
           Succinic Semialdehyde Dehydrogenase Deficiency 429  
           Homocarnosinosis 429  
        Inborn Errors of Receptors and Trans-porters of Neurotransmitters 430  
           Hyperekplexia 430  
           GABA Receptor Mutations 431  
           Glutamate Receptor Mutations 431  
           Mitochondrial Glutamate Transporter Defect 431  
           Dopamine Transporter Defect 432  
           Brain Dopamine-Serotonin Vesicular Transport Defect 432  
        Inborn Errors of Monoamine Metabolism 432  
           Tyrosine Hydroxylase Deficiency 432  
           Aromatic L-Aminoacid Decarboxylase Deficiency 433  
           Dopamine ß-Hydroxylase Deficiency 434  
           Monoamine Oxidase-A Deficiency 434  
           Guanosine Triphosphate Cyclohydrolase-I Deficiency 435  
           Sepiapterine Reductase Deficiency 436  
        References 436  
     30Trimethylaminuria, Dimethyl-glycine Dehydrogenase Deficiency and Disorders in the Metabolism of Glutathione 439  
        Trimethylaminuria (Fish Malodour Syndrome ) 441  
           Metabolic Derangement 441  
           Genetics 441  
           Clinical Presentation 441  
           Diagnostic Tests 442  
           Treatment 442  
        Dimethylglycine Dehydrogenase Deficiency 442  
           Clinical Presentation 442  
           Metabolic Derangement 442  
           Genetics 442  
           Diagnostic Tests 442  
           Treatment 443  
        Disorders in the Metabolism of Glutathione 443  
           y-Glutamylcysteine Synthetase Deficiency 443  
           Glutathione Synthetase Deficiency 444  
           y-Glutamyl Transpeptidase Deficiency 445  
           5-Oxoprolinase Deficiency 446  
           Dipeptidase Deficiency 446  
           Secondary 5-Oxoprolinuria 446  
        References 446  
  Section VII Disorders of Lipid and Bile Acid Metabolism 448  
     31Inborn Errors of Lipoprotein Metabolism Presenting in Childhood 449  
        Disorders of Low Density Lipoprotein Metabolism 451  
        Disorders of Triglyceride (TG) Metabolism 453  
        Disorders of High Density Lipoprotein Metabolism 461  
        Disorders of Sterol Storage 461  
        Conclusion 461  
        References 461  
     32Disorders of Isoprenoid/ Cholesterol Synthesis 463  
        Mevalonate Kinase Deficiency 465  
        Smith-Lemli-Opitz Syndrome (7-Dehydrocholesterol Reductase Deficiency ) 466  
        Sterol .8-.7 Isomerase Deficiency 467  
           X-Linked Dominant Chondrodysplasia Punctata 2 or Conradi-Hünermann Syndrome in Females 467  
           Hemizygous EBP Deficiency in Males 468  
        Deficiency of the C4-Demethylase Complex 468  
           C4-Methyl Sterol Oxidase Deficiency (SMO Deficiency) 468  
           Sterol 4a-Carboxylate 3-Dehydrogenase Deficiency 468  
        Desmosterol Reductase Deficiency (Desmosterolosis) 469  
        Sterol .5-Desaturase Deficiency (Lathosterolosis) 469  
        Sterol .14-Reductase Deficiency (Hydrops – Ectopic Calcification – Moth-eaten (HEM) Skeletal Dysplasia or Greenberg Skeletal Dys 470  
        References 471  
     33Disorders of Bile Acid Synthesis 473  
        3ß-Hydroxy-.5-C27-Steroid Dehydrogenase Deficiency 475  
        .4-3-Oxosteroid 5ß-Reductase Deficiency 476  
        Cerebrotendinous Xanthomatosis (Sterol 27-Hydroxylase Deficiency ) 477  
        a-Methylacyl-CoA Racemase Deficiency (see also Chapter 40) 479  
        Oxysterol 7a-Hydroxylase Deficiency 479  
        Bile Acid Amidation Defect 1 : Bile Acid CoA : Amino Acid N-Acyl Transferase Deficiency 480  
        Bile Acid Amidation Defect 2 : Bile Acid CoA Ligase Deficiency 480  
        Cholesterol 7a-Hydroxylase Deficiency 481  
        Disorders of Peroxisome Biogenesis, Peroxisomal Import and Peroxisomal ß-Oxidation 481  
        References 481  
     34Disorders of Intracellular Triglyceride and Phospholipid Metabolism 484  
        Inborn Errors of the Common Pathway of Acylglycerol and Phospholipid Synthesis 486  
           Glycerol-3-phosphate Dehydrogenase 1 (GPD1) Deficiency : Autosomal Recessive Hepatic Steatosis and Hypertriglyceridemia 486  
           Glycerol Kinase Deficiency is described in Chapter 7 486  
           1-Acylglycerol-3-Phosphate O-Acyltransferase 2 (AGPAT2) Deficiency : Autosomal Recessive Generalized Congenital Lipodystrophy 486  
           Phosphatidic Acid Phosphatase (PAP 486  
           Diacylglycerol Kinase Epsilon (DGKE) Deficiency : Atypical Haemolytic Uremic Syndrome 487  
        Inborn Errors of Cytoplasmic Triglyceride Metabolism 487  
           Diacylglycerol O-Acyl Transferase 1 (DGAT1) Deficiency : Congenital Diarrhea 487  
           Perilipin 1 Deficiency : Autosomal Dominant Partial Lipodystrophy 488  
           Neutral Lipid Storage Diseases (NLSDs) : ATGL and CGI-58 Deficiencies 488  
           Hormone-Sensitive Lipase (HSL) Deficiency 488  
        Inborn Errors of Phospholipid Biosynthesis 490  
        Choline Kinase ß (CHKß) Deficiency: Congenital Muscular Dystrophy, Megaconial Type 490  
           Choline-PhosphateCytidylyltrans-ferase a (CCTa) Deficiency : Spondylometaphyseal Dysplasia with Cone-Rod Dystrophy or Congenital 490  
           PhosphatidylserineSynthase 1 (PSS1) Gain of Function (Lenz-Majewski Hyperostotic Dwarfism ) 490  
           Acylglycerol Kinase (AGK) Deficiency : Myopathy, Hypertrophic Cardiomyopathy and Congenital Cataract (Sengers Syndrome ) 491  
           Cardiolipin Remodeling Enzyme Deficiency : X-linked Cardiomyopathy and Neutropenia (Barth Syndrome ) 491  
           Mutation : Methylglutaconic Aciduria, Deafness, Hepatic I nvolvement, Encephalopathy, and Leigh Syndrome (MEGDHEL Syndrome ) 492  
           Mitochondrial Calcium Independent Phospholipase A2. (iPLA2.): Autosomal Recessive Myopathy, Dystonia and Convulsions (not shown) 492  
        Inborn Errors related to Phospholipid Remodeling 492  
           a/ß Hydrolase Domain-Containing Protein 12 (ABHD12) Deficiency : Polyneuropathy, Hearing loss, Ataxia, Retinitis Pigmentosa and 492  
           Phospholipase A2 Deficiency (PLA2G6) : Autosomal Recessive Infantile Neuroaxonal Dystrophy, Neurodegeneration with Brain Iron Accumulation 493  
           Deficiencies of Neuropathy TargetEsterase (NTE or PNPLA-6) orMitochondrial Calcium-independentPhospholipase A2? (PNPLA6):Peripheral Neuropathy, SpasticParaplegia, ChorioretinalDegeneration, HypogonadotrophicHypogonadism, Trichomegaly(SPG39, Boucher-Neuhauser , Gordon-Holms , Oliver-McFarlane , Laurence-Moon syndromes ) or MitochondrialMyopathy with Dystonia 493  
           DDHD1 and DDHD2 Mutations :Hereditary Spastic Paraplegias28 and 45 494  
           CYP2U1 Mutation : Spastic Paraplegiawith Basal Ganglia Calcification(Hereditary Spastic Paraplegia 56,SPG56) 494  
           Inborn Errors of Polyphosphoinositide Metabolism 495  
        References 495  
  Section VIII Disorders of Nucleic Acid and Heme Metabolism 499  
     35Disorders of Purine and Pyrimidine Metabolism 500  
        Inborn Errors of Purine Metabolism 502  
           Phosphoribosyl Pyrophosphate Synthetase Superactivity 502  
           Phosphoribosyl Pyrophosphate Synthetase Deficiency 502  
           Adenylosuccinase Deficiency 503  
           AICA-Ribosiduria 503  
           Muscle Adenosine Monophosphate Deaminase 1 Deficiency 503  
           Adenosine Monophosphate Deaminase 2 and 3 Deficiencies 504  
           Adenosine Deaminase 1 Deficiency 504  
           Adenosine Deaminase 2 Deficiency 506  
           Adenosine Deaminase Superactivity 506  
           Purine Nucleoside Phosphorylase Deficiency 506  
           Xanthine Oxidase Deficiency 506  
           Hypoxanthine-Guanine Phosphoribosyltransferase Deficiency 507  
           Adenine Phosphoribosyl-transferase Deficiency 508  
           Adenylate Kinase 1 Deficiency 509  
           Adenylate Kinase 2 Deficiency 509  
           Adenosine Kinase Deficiency 509  
           Adenylate Cyclase 5 Mutations 509  
           IMP Dehydrogenase Mutations 509  
           Deoxyguanosine Kinase Deficiency 509  
           Thiopurine Methyltransferase Deficiency 510  
           Inosine Triphosphatase Deficiency 510  
        Inborn Errors of Pyrimidine Metabolism 510  
           CAD (Carbamoylphosphate Synthetase II, Aspartate Transcarba-mylase, Dihydroorotase) Deficiency 510  
           UMP Synthase Deficiency (Hereditary Orotic Aciduria ) 510  
           Miller syndrome (Dihydroorotate Dehydrogenase Deficiency ) 512  
           Dihydropyrimidine Dehydrogenase Deficiency 512  
           Dihydropyrimidinase Deficiency 513  
           Ureidopropionase Deficiency 513  
           Pyrimidine 5’-Nucleotidase Deficiency 513  
           Cytosolic 5’-Nucleotidase Superactivity 513  
           Thymidine Phosphorylase Deficiency 513  
           Cytidine Deaminase Deficiency 514  
           Thymidine Kinase 2 Deficiency 514  
        References 514  
     36Disorders of Haem Biosynthesis 519  
        X-Linked Sideroblastic Anaemia 521  
        The Porphyrias 521  
        Classification and Diagnosis 521  
        5-Aminolevulinic Acid Dehydratase Porphyria 523  
        Acute Intermittent Porphyria (AIP) 523  
        Congenital Erythropoietic Porphyria (CEP) (Gunther Disease ) 525  
        Porphyria Cutanea Tarda (PCT) 526  
        Hepatoerythropoietic Porphyria 527  
        Hereditary Coproporphyria and Variegate Porphyria 527  
        Erythropoietic Protoporphyria and X-Linked Protoporphyria 528  
        References 529  
  Section IX Disorders of Metal Transport and Metabolism 532  
     37Disorders in the Transport of Copper, Iron, Magnesium, Manganese, Selenium and Zinc 533  
        Copper 534  
           Wilson Disease 535  
           Menkes Disease 537  
           Other Copper Storage Disorders 538  
           Other Disturbances of Copper Metabolism with a Low Serum Copper 538  
        Iron 539  
           Systemic Iron Overload Syndromes (Haemochromatosis ) 540  
           Iron Deficiency and Distribution Disorders 541  
           Neurode generation with Brain Iron Accumulation (NBIA) 542  
        Magnesium 543  
           Primary Hypomagnesaemia with Secondary Hypocalcaemia 543  
           Hypomagnesaemia with Hyper-calciuria and Nephrocalcinosis 544  
           Isolated Dominant Hypomagnesemia 544  
           Isolated Autosomal Recessive Hypomagnesaemia 545  
        Manganese 545  
           Inherited Manganism Due to Mutations in 545  
           Manganese Transporter Defect 546  
        Selenium 546  
        Zinc 546  
           Acrodermatitis Enteropathica 547  
           Zinc Deficiency in Breastfed Babies 548  
           Hyperzincaemia with Hypercalprotectinaemia 548  
           Autosomal Dominant Hyperzincaemia without Symptoms 548  
        References 548  
  Section X Organelle-Related Disorders: Lysosomes, Peroxisomes, and Golgi and Pre-Golgi Systems 551  
     38Disorders of Sphingolipid Synthesis, Sphingolipidoses, Niemann-Pick Disease Type C and Neuronal Ceroid Lipofuscinoses 552  
        Disorders of Sphingolipid Synthesis 554  
           Serine Palmitoyltransferase (Subunit 1 or 2) Deficiency and HSAN1 554  
           Defects in Ceramide Synthases 1 and 2 and Myoclonic Epilepsy 555  
           Fatty Acid 2-Hydroxylase Deficiency (SPG35/FAHN) 556  
           GM3 Synthase Deficiency and Amish Epilepsy Syndrome 556  
           GM2/GD2 Synthase Deficiency (SPG26) 556  
           Nonlysosomal ß-Glucosidase GBA2 Deficiency : SPG46 and Ataxia 556  
           Ceramide Synthase 3 and Ultra-Long Chain Fatty Acid .-Hydroxylase (CYP4F22) Deficiencies : Autosomal Recessive Congenital Ichthy 556  
           Mutations in Ceramide Kinase-Like (CERKL) Gene and Retinal Dystrophy 557  
           Alkaline Ceramidase 3 (ACER3) Deficiency : Infantile Leukodystrophy 557  
        Sphingolipidoses 557  
           Gaucher Disease 557  
           Acid Sphingomyelinase-Deficient Niemann-Pick Disease (Type A, Type B and Intermediate Forms) 560  
           GM1 Gangliosidosis 561  
           GM2 Gangliosidoses 562  
           Krabbe Disease 563  
           Metachromatic Leukodystrophy 564  
           Fabry Disease 566  
           Farber Disease / Acid Ceramidase Deficiency 567  
           Prosaposin Deficiency 567  
        Niemann-Pick Disease Type C 567  
           Clinical Presentation 567  
           Metabolic Derangement 568  
           Genetics 569  
           Diagnostic Tests 569  
           Treatment and Prognosis 569  
        Neuronal Ceroid Lipofuscinoses 569  
           Clinical Presentation 569  
           Metabolic Derangement 571  
           Genetics 572  
           Diagnostic Tests 572  
           Treatment and Prognosis 572  
        Re ferences 572  
     39Mucopolysaccharidoses, Oligosaccharidoses and Sialic Acid Disorders 577  
        Mucopolysaccharidoses 579  
           Clinical Presentation 579  
           Metabolic Derangement 583  
           Genetics 583  
           Diagnostic Tests 583  
           Treatment and Prognosis 583  
        Oligosaccharidoses and Mucolipidoses 585  
           Clinical Presentation 585  
           Metabolic Derangements 587  
           Genetics 587  
           Diagnostic Tests 588  
           Treatment and Prognosis 588  
        References 588  
     40Inborn Errors of Non-Mitochondrial Fatty Acid Metabolism Including Peroxisomal Disorders 591  
        Disorders of Etherphospholipid Biosynthesis 594  
           Peroxin 7 (PEX7) Deficiency (RCDP Type 1) 594  
           Glycerone 3-Phosphate Acyltransferase (GNPAT) Deficiency (RCDP type 2) 594  
           Alkylglycerone 3-Phosphate Synthase (AGPS) Deficiency (RCDP Type 3) 594  
           PEX5L-Deficiency (RCDP Type 4) 594  
           Fatty Acyl-CoA Reductase 1 (FAR1) Deficiency 595  
        Disorders of Peroxisomal ß-Oxidation 595  
           X-Linked Adrenoleukodystrophy 595  
           D-Bifunctional Protein (DBP) Deficiency 596  
           Acyl-CoA Oxidase (ACOX) Deficiency 597  
           Methyl Acyl-CoA Racemase (AMACR) Deficiency 597  
           Sterol Carrier Protein-2 (SCPx) Deficiency 598  
           PMP70 Deficiency 598  
           Contiguous 598  
           Syndrome (CADDS) 598  
           Zellweger Spectrum Disorders (ZSD) 598  
        Disorders of Peroxisomal Fatty Acid Alpha-Oxidation 599  
           Adult Refsum Disease (ARD) 599  
        The Fatty Acid Chain Elongation Disorders 600  
           ELOVL4 Deficiency 600  
           ELOVL5 Deficiency 601  
           Trans-2,3-Enoyl-CoA Reductase (TER) Deficiency 601  
           3-Hydroxyacyl-CoA Dehydratase1 (HACD1) Deficiency 601  
        Disorders of Eicosanoid Metabolism 601  
           Primary Hypertrophic Osteo-arthropathy Type 1 (PHOAR1): 15-Hydroxy Prostaglandin Dehydrogenase (PGDH) Deficiency and Type 2 (PHO 601  
           LTC4-Synthase Deficiency 603  
        Remaining Disorders of Fatty Acid Homeostasis 603  
           Sjögren Larsson Syndrome (SLS) 603  
           Bile Acid-CoA: Amino Acid N-Acyltransferase (BAAT) Deficiency 604  
        Other Peroxisomal Disorders not Involving Fatty Acid Metabolism 604  
           Oxalurias and Oxalosis: Glyoxylate Detoxification Disorders 604  
           Pipecolic Acidemia 604  
           Acatalasemia 604  
        References 605  
     41Congenital Disorders of Glycosylation, Dolichol and Glycosylphosphatidylinositol Metabolism 607  
        Introduction 609  
        Congenital Disorders of Protein N-Glycosylation (. Table 41.1) 611  
           Phosphomannomutase 2 Deficiency (PMM2-CDG) 611  
           Mannosephosphate Isomerase Deficiency (MPI-CDG) 612  
           Glucosyltransferase 1 Deficiency (ALG6-CDG) 612  
           Mannosyltransferase 1 Deficiency (ALG1-CDG) 613  
           UDP-GlcNAc:Dol-P-GlcNAc-P Trans-ferase Deficiency (DPAGT1-CDG) 613  
           Golgi a1-2 Mannosidase 1 Deficiency (MAN1B1-CDG) 614  
        Congenital Disorders of Protein O-Glycosylation (. Table 41.2) 614  
           Progeroid Variant of Ehlers-Danlos Syndrome (B4GALT7-CDG) 614  
           GALNT3 Deficiency (GALNT3-CDG) 614  
           Hereditary Multiple Exostoses (EXT1/EXT2-CDG) 614  
           Cerebro-Ocular Dysplasia-Muscular Dystrophy Syndromes , Types A1, B1, C1/A2, B2, C2 (POMT1/POMT2-CDG) 616  
           Muscle-Eye-Brain Disease, Types A3, B3, C3 (POMGNT1-CDG) 616  
           O-Fucose-Specific ß-1,3-Glucosyl-trans ferase Deficiency (B3GALTL-CDG) 616  
        Defects in Lipid Glycosylation and in Glycosylphosphatidylinositol (GPI) Anchor Biosynthesis (. Table 41.3) 616  
           GM3 Synthase Deficiency (ST3GAL5-CDG) 616  
           GM2 Synthase Deficiency (B4GALNT1-CDG) 616  
           PIGA Deficiency (PIGA-CDG) 616  
        Defects in Multiple Glycosylation Pathways and in Other Pathways I ncluding Dolicholphosphate Biosynthesis Defects (. Table 41.4 616  
           Hereditary Inclusion Body Myopathy (GNE-CDG) 616  
           Congenital Myasthenic Syndrome-12 (GFPT1-CDG) 617  
           Steroid 5-a-Reductase Deficiency (SRD5A3-CDG) 617  
           COG6 Deficiency (COG6-CDG) 620  
           Autosomal Recessive Cutis Laxa Type 2 (ATP6V0A2-CDG) 620  
           Phosphoglucomutase 1 Deficiency (PGM1-CDG) 620  
           Golgi Homeostasis Disorders: TMEM199 and CCDC115 Deficiencies 620  
           Manganese and Zinc Transporter Defect : SLC39A8 Deficiency 620  
        Congenital Disorders of Deglycosylation 621  
           N-glycanase 1 Deficiency 621  
           Lysosomal Storage Disorders 621  
        References 621  
     42Cystinosis 623  
        Infantile Cystinosis 624  
           Clinical Presentation 624  
           Metabolic Derangement 626  
           Genetics 626  
           Diagnostic Tests 626  
           Treatment 626  
        Late-Onset Cystinosis 627  
        Ocular Cystinosis 628  
        References 628  
  Section XI Appendix 630  
     43Medications Used in the Treatment of Inborn Errors 631  
  Subject Index 640  

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