PRIMARY CUTANEOUS B-CELL LYMPHOMA

A 63-year-old woman presented with a single plaque on her left earlobe that was shown to be a B-cell lymphoma on histopathologic examination . Immunohistochemical studies on the paraffin-embedded tissue and now cytometry of fresh tissue helped characterize the neoplasm. She had no other systemic involvement and a diagnosis of primary cutaneous B-cel l lymphoma was made. This neoplasm has, in general, a good prognosis w ith excellent response to radiation therapy, polychemotherapy, or both .