[Gunther's congenital erythropoietic porphyria in an 8-month old girl (author's transl)].

A typical case of congenital erythropoietic porphyria in a 8 month old girl is reported (photosensitive blistering syndrome, hypertrichosis; erythrodontia; fluorescence of urine, teeth, erythrocytes and myeloblasts; splenomegaly; anaemia). Porphyrins, isomers I, were present in urine and blood. In faeces a porphyrin-X-like substance migrating as PX was detected; this porphyrin was finally identified as CP I unusually difficult to extract because of the presence of a banding and fluorescence quenching agent probably of exogenous origin. The usual methods are not always able to extract and to identify the faecal porphyrins.