[Porphyria cutanea tarda in a 4-year-old child with uroporphyrinogen decarboxylase deficiency]

A 4 years old girl presents a typical case of patent form of cutaneous late porphyria with a reduced activity of the erythrocyte, uroporphyrinogen decarboxylase (UROD) genetically transmitted over 3 generations; a multifactor inheritance (HLA A3, a normal phenotype of alpha 1 antitrypsin, exogenous toxins, or viral infections) is discussed.