The lateral thora cic arteries and veins passed thorough the triangular space between pectoralis m ajor muscle and latissimys dorsi after they emerged from the middle of lower edg e of pectoralis minor muscle at 3rd rib.

• 面胸外侧动、静脉于胸小肌下缘中部第 3、4肋间隙穿出胸小肌后也暴露于此三角内 ；其压径 (2 .；7± 0