Chest Imaging

Plasmocytoma

a well-defined neoplastic proliferation of plasma cells in the absence of a generalized plasma cell disorder. Plasmocytomas consist most often of an isolated expansile osteolytic lesion of bone or a visceral or soft tissue mass. Rarely, these tumours are located in the lungs or proximal airways. Pulmonary plasmocytomas present radiographically as a nodule or lobulated mass. Tracheal plasmocytoma may not be detected on the radiograph and are seen as a focal polypoid lesion on CT. Endobronchial plasmotycomas can cause atelectasis or obstructive pneumonitis. Ossification may occasionally be present. Pleural effusion is rare.

PG