Acrodermatitis enteropathica-like eruptions in a child with Hartnup disease.

Acrodermatitis enteropathica-like eruptions, not related to zinc deficiency, have been rarely reported in some metabolic disorders. Reported patients usually had low levels of essential amino acids, particularly isoleucine. Here we report a girl who first presented with an acrodermatitis enteropathica-like eruption and eventually had the diagnosis of Hartnup disease with a normal isoleucine level. We discuss the probable cause of her skin lesions and the differential diagnosis with pellagra.