title: Tyrosinemia type II in two cases previously reported as Richner-Hanhart syndrome.
abstract: Two sibs with palmo-plantar keratosis and dendritic corneal opacities, previously described as suffering from Richner-Hanhart syndrome by other authors, about 25 years ago, showed increased plasma and urine tyrosine levels. Their neurological and mental features were within normal limits. A comprehensive review of the literature showed a total of 47 cases of fully documented tyrosinemia type II; 8 more patients also had the clinical features of the disease, but aminoacidemia had never been observed. The importance of early diagnosis is stressed, since a low tyrosine-phenylalanine diet dramatically improves the symptoms and may prevent mental retardation.
mesh_terms: D000328:Adult; D000592:Amino Acid Metabolism, Inborn Errors / Q000175:diagnosis / Q000235:genetics* / Q000378:metabolism; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007635:Keratitis, Dendritic / Q000175:diagnosis / Q000235:genetics*; D007645:Keratoderma, Palmoplantar / Q000175:diagnosis / Q000235:genetics* / Q000378:metabolism; D008297:Male; D014443:Tyrosine / Q000097:blood*
chemical_list: D014443:Tyrosine