[Lymphomatoid papulosis in a child].

We report a case of a 3-year-old boy who developed crops of papules and ulcerating nodules on the limbs in April 1992. Periodically, new lesions continue to erupt, while others resolve spontaneously. This course is characteristic for rhythmic paradoxical eruptions. This course and the clinical picture, supported by the histopathological and immunohistochemical findings, led to the diagnosis of lymphomatoid papulosis. Lymphomatoid papulosis is extremely rare in childhood. All published cases of lymphomatoid papulosis in children under 10 years of age are reviewed. The differential diagnosis of lymphomatoid papulosis in childhood includes arthropod assaults, pityriasis lichenoides et varioliformis acuta, primary cutaneous Hodgkin's disease, Ki-1 large cell anaplastic lymphoma and other lymphomas and pseudolymphomas in children.