Diffuse Large B-cell Lymphoma Presenting as a Primary Pleural Mass: A Case Report and Literature Review.

Primary pleural lymphoma is a rare type of lymphoma that accounts for only ​​0.3% of all non-Hodgkin's lymphomas. The rarity and nonspecific clinical presentation of primary pleural lymphomas pose a diagnostic challenge for clinicians. We present an atypical case of primary pleural lymphoma in an elderly patient without any associated pleuro-pulmonary disease, immunosuppression, or history of lymphoma. To our knowledge, this is one of the first described cases of a primary pleural lymphoma with such a presentation.