Table 2.
Classification of IEMs those presented with Autistic features
| Aminoacidopathies | Organic Acidemia&Aciduria |
| Fatty acid Metabolism | Vitamins & Minerals Related Disorders |
| Carnitine related disorders | Mucopolysacharidosis |
| Mitochondrial Disorders | Urea Cycle defect |
| Creatin Related Disorders | Miscellaneous |
| Purine & Pyrimidine Disorders |