我们在一具女性成人尸体上发现一例右胸廓内动脉发出二支甲状腺最下动脉(见附图)。此种变异在甲状腺手术及气管切开术中值得注意,现报道如下。右甲状颈干在前斜角肌内侧缘发自锁骨下动脉。甲状颈干向上内发出一支甲状腺下动脉。向下发出一枝胸廓内动脉,其动脉起始部外径为2.8mm,胸廓内动脉在胸锁关节后方向上发出一甲状腺最下动脉短干,短干又分为左右两支,分别到达甲状腺右下叶,峡部和左下叶。 We found a case of a female adult with one case of the right thoracic artery which sent out the two thyroid inferior arteries (see the attached figure). This variation is noteworthy in thyroid surgery and tracheotomy, are reported below. Right thoracic stem in the anterior scalene medial margin from the subclavian artery. Thyroid neck up within a thyroid artery issued. Issued an internal thoracic artery, the artery diameter of the starting portion of 2.8mm, the internal thoracic artery in the direction of the sternoclavicular joint issued a thyroid artery short, dry and divided into two left and right, respectively, to the right thyroid Lower leaves, isthmus and left lower lobe.