Figure 1From: Abnormal origin of internal thoracic artery from the thyrocervical trunk: surgical considerations Common origin of the left internal thoracic artery (ITA) and thyrocervical trunk (TCT). The ITA arises from the subclavian artery (SCA) as a common trunk with the inferior thyroid (IThA) and suprascapular (SSA) arteries. CCA: common carotid artery, ASM: anterior scalene muscle, L: left lung.Back to article page