Porphyria cutanea tarda and hematologic malignancy--a report of 4 cases.

Porphyria cutanea tarda has been reported in association with a variety of myeloproliferative and lymphoproliferative disorders, suggesting a possible association between these conditions. We describe four patients presenting within a 12 month period with sporadic porphyria cutanea tarda shortly following the diagnosis of hematologic malignancy. A review of the literature and evidence supportive of a causal association are presented.