Metachronous lesions in the orbit, retroperitoneum, and pleura of mucosa-associated lymphoid tissue lymphoma: A case report.

Background: Mucosa associated lymphoid tissue (MALT) lymphoma of the orbit is rare, often indolent, but can recur, and spread to extra-nodal sites. Pleural and retroperitoneum recurrences of MALT lymphoma are rare.

Case: A 65-year-old man was referred to our hospital due to right pleural effusion and difficulty in breathing.