Not a feature of Hanup's disease:
Hanup disease: Most children remain asymptomatic In symptomatic patient- cutaneous photosensitivity: pellagra-like rash on sun exposure Some patients may have intermittent ataxia & psychological disturbances, but mental development is usually normal.
Pellagroid skin lesion
Cerebellar ataxia
Mental retardation
Psychological disturbances
Disorders of Amino acid Metabolism