Extramedullary multiple myeloma simulating lymphoproliferative disease on multimodality imaging.

A 77-year-old male with monoclonal gammopathy of undertermined significance presented with multiple bulky extraosseous soft-tissue masses on imaging tests, mimicking radiological features of lymphoma. Ultimately, a diagnosis of multifocal extraosseous multiple myeloma was established, highlighting the need for comprehensive clinical and diagnostic correlation to ensure appropriate management.