Pulmonary Plasmacytoma - Rare Occurrence in Multiple Myeloma: Case Presentation and Short Review of the Literature.

Multiple myeloma is a hematological malignancy mostly diagnosed in the elderly. It is characterized by a chronic evolution with alternating periods of remission and relapses. Plasmacytoma, a tumor comprised of monoclonal plasma cells, is a typical finding in multiple myeloma patients, being more frequently observed during relapses.