Coexistence of primary pulmonary Hodgkin lymphoma and gastric MALT lymphoma associated with Epstein-Barr virus infection: a case report.

We describe a 66-year-old woman with Epstein-Barr virus-associated lymphoproliferative disorder with lung and gastric tumors. We identified two lung tumors measuring 13 and 20 mm in diameter that consisted of CD30-, CD15-, and CD20-positive Hodgkin- and Reed-Sternberg-like cells and heterogeneous cellular infiltrates in a pronounced nodular pattern, with necrosis and vasculitis, diagnosed as nodular sclerosis classical Hodgkin lymphoma. A gastric tumor showed low-grade extranodal marginal zone B-cell lymphoma of the mucosa-associated lymphoid tissue type. Neoplastic cells in all tumors expressed Epstein-Barr virus-encoded RNA based on in situ hybridization. The present case is a rare composite lymphoma arising from different extranodal organs, associated with EBV infection. Her medical history included gamma-knife therapy for clinical diagnosis with a suspicion of cerebral lymphoma.