Primary plasmacytoma of the atrium. Report of a case with successful surgical management.

A 44-year-old woman with a superior caval syndrome was found to have an isolated plasmacytoma of the right atrium causing partial obstruction of the superior and inferior vena cavae. The tumor was excised locally, and after operation, irradiation was given. There has been no local recurrence or systemic disease demonstrated after 30 months. This is the first reported surgical excision of an intracardiac plasmacytoma.