<prompt> Not a feature of Hanups disease:Pellagroid skin lesionCerebellar ataxiaMental retardationPsychological disturbances  <response>: 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. 