Abstract
1. 1. Three cases of acute subclavian vein occlusion are reported. Two developed in patients previously operated upon for carcinoma, but without evidence of metastasis. Changes in anatomic relationships resulting from cutting the pectoralis major and minor muscles may predispose the patient to venous occlusion or a shoulder syndrome. 2. 2. Anterior scalenotomy with the possible aid of severance of the costocoracoid ligament relieved residual symptoms in two cases. 3. 3. An operative venogram with silver clips appropriately placed clearly demonstrated that cutting an enlarged anterior scalene muscle released the pressure on the subclavian vein. 4. 4. Acute subclavian vein occlusion may be considered the venous component of the scalenus anticus syndrome.
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