Thallium poisoning: a dermatological perspective.

The dermatological findings in five patients with thallium poisoning are described. Cutaneous involvement consisted mainly of an acneiform eruption, pellagra-like dyssebacea, crusted eczematous lesions and dry scaling of the distal parts of the extremities. Alopecia was not evident initially but later became apparent. The patients also had gastrointestinal and neurological symptoms and signs.