Incidental diagnosis of a rare pancreatic plasmacytoma with plasmablastic features.

Multiple myeloma is a plasma cell neoplasm that accounts for 10% of all hematologic malignancies, characterized by malignant proliferation of monoclonal plasma cells in the bone marrow. It predominantly affects men 60 to 70 years of age. Plasmacytoma is a discrete mass of neoplastic monoclonal plasma cells that may be osseous or extramedullary. Though extramedullary plasmacytomas are uncommon, they can involve any tissue or organ. Only a few cases of pancreatic involvement have been reported. We report a case of a 78-year-old woman with a long-standing history of multiple myeloma noted to have pancreatic tail involvement with plasmacytoma with plasmablastic features. Multiple myeloma with plasmablastic transformation has a poor prognosis; hence, a multidisciplinary team approach is crucial to identify and initiate appropriate management in these cases.