Mediastinal masses not infrequently present themselves as problems for diagnosis. Benign vascular tumours of the mediastinum are rare. Adams and Bloch (1944) reported a case in which the tumour was incompletely removed at operation. The patient was alive and well four years later. The subject was reviewed by Seybold, McDonald, Clagett, and Harrington (1949), who collected 14 cases from the lite...
