Porphyria cutanea tarda Gaucher's disease von Hippel-Lindau disease Huntington's chorea Polyposis coli Haemochromatosis 21-Hydroxylase deficiency Osteogenesis imperfecta (some forms) Cystic fibrosis Galactosaemia Multiple endocrine neoplasia Ila Sickle cell anaemia and a thalassaemia Acute intermittent porphyria Phenylketonuria (classic) Wilson's disease Retinoblastoma a,-Antitrypsin deficiency...