Lymphomatoid papulosis. Case reports and literature review.

Five new cases of lymphomatoid papulosis are reported. This entity can apparently be divided into at least two subtypes. In one group of patients, papulopustular lesions resembling those of pityriasis lichenoides develop that resolve spontaneously within a few weeks. The lesions contain an epidermotropic dermal infiltration composed predominantly of abnormal lymphocytes. The other group of patients displays larger, more persistent lesions that contain a nonepidermotropic dermal infiltration composed predominantly of histiocytes. Lymphoma eventually develops in about 10% of the patients with lymphomatoid papulosis.