Multiple myeloma (MM) is a malignant disorder of plasma cells and includes 1% of all malignancies and 10% to 13% of hematologic cancers. Multiple myeloma, characterized by malignant proliferation of plasma cells, leads to the production of monoclonal immunoglobulins. Pleural involvement by plasma cells in multiple myeloma is rare.
We report a 61-year-old woman with myelomatous pleural effusion in MM.
A few cases of pleural effusion secondary to MM, in literature, with an incidence of less than 1%, were reported.