Glycogen storage disease 1a with piebaldism.

A 3 and half years old male child born by consanguineous marriage presented with white forelock and symmetric hypopigmented areas present since birth, similar to his mother and elder sister. Hepatomegaly was noticed at one year of age. Liver biopsy revealed enlarged pale hepatocytes distended with glycogen. Skin biopsy revealed absence of melanin pigment in white depigmented skin. G727T gene splice mutation was diagnosed in exon 5 of 17q21 chromosome.