A bifurcated anterior scalene muscle: A case report

Anomalies of the structures related to the scalene triangle have been reported in the literature as a cause of either vascular or neurogenic thoracic outlet syndrome (TOS). This case report details a male cadaver with a right anterior scalene muscle that was split into two bellies, enclosing the right subclavian artery anteriorly and posteriorly. The trunks of the brachial plexus ran in the space between the posterior belly of the anomalous...