[Comparative morphological studies on porphyria cutanea tarda and erythropoietic protoporphyris].

Porphyria cutanea tarda and erythropoietic protoporphyria have common morphological features. Six patients with porphyria cutanea tarda and three patients with erythropoietic protoporphyria were studied with the electron microscope. Ultrastructural finding of connective tissue, basal lamina, and blood vessels are discussed.