Granuloma annulare perforans limited to a thoracic dermatome that was previously involved by herpes zoster occurred in a 51-year-old woman who also had Lennert's lymphoma. Of the various local granulomatous infiltrates described after herpes zoster, granuloma annulare perforans is unique, although ordinary granuloma annulare has been described in a few patients. A high incidence of specific and nonspecific reaction patterns in herpes zoster scars has been described in patients with malignant lymphoma. In contrast to previous patients, all of whom had chronic lymphatic leukemia, our patient had Lennert's lymphoma.