Ohashi K, El-Khoury G Y, Albright J P, Tearse D S
Department of Radiology, University of Iowa, College of Medicine, Iowa City 52242-1077, USA.
Skeletal Radiol. 1996 Oct;25(7):625-8. doi: 10.1007/s002560050148.
Rupture of the pectoralis major muscle is a rare clinical entity. Only few reports have discussed its MRI or CT features. We have reviewed the imaging features of four cases of complete rupture of the pectoralis major muscle. One case of acute injury underwent surgical repair. MRI is useful in delineating the site and extent of the rupture in relation to the musculotendinous junction, which will help the surgeons with possible treatment options and surgical planning. Because of the complex anatomy of the pectoralis major muscle near its insertion on the humerus and the signal characteristics of hematoma and edema in the muscle, axial T2-weighted images were most valuable for the evaluation of acute and subacute injuries. Axial T1-weighted images were helpful in delineating chronic injuries. CT is inferior to MRI for direct visualization of muscle rupture.
胸大肌断裂是一种罕见的临床病症。仅有少数报告讨论过其MRI或CT特征。我们回顾了4例胸大肌完全断裂的影像学特征。1例急性损伤患者接受了手术修复。MRI有助于明确断裂部位及与肌腱结合处相关的断裂范围，这将有助于外科医生选择可能的治疗方案并进行手术规划。由于胸大肌在肱骨附着处附近解剖结构复杂，且肌肉内血肿和水肿具有信号特征，因此轴向T2加权图像对评估急性和亚急性损伤最有价值。轴向T1加权图像有助于明确慢性损伤。在直接观察肌肉断裂方面，CT不如MRI。
