Benign Blood Vascular Tumors of the Mediastinum

Abstract
Four new cases and 77 previously reported cases of benign blood vascular tumors of the mediastinum are reviewed. The vast majority are hemangiomas (90%), occur in the first 4 decades of life (75%) and arise in the anterior mediastinum (68%). Compression and/or invasion of adjacent structures is not uncommon. Concomitant extrathoracic extension (2%) and multiple sites of involvement (2%) are rare. The tumors are smoothly outlined, occasionally lobulated and can be accurately identified when phleboliths are present (10%).

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