Ge Zufeng, Tong Yunlong, Zhu Shiqiang, Fang Xiong, Zhuo Lang, Gong Xiangyang
Department of Radiology, Fenghua People's Hospital, Fenghua, 315500, China,
Surg Radiol Anat. 2014 Apr;36(3):219-24. doi: 10.1007/s00276-013-1175-4. Epub 2013 Aug 3.
To analyze the prevalence, anatomical features, as well as variance of the sternalis muscle in the Chinese population using multi-detector computed tomography (MDCT).
We retrospectively reviewed 6,000 adult axial MDCT images to determine the overall and gender prevalence of the sternalis muscles. We also analyzed the side prevalence and anatomical features, including shape, size, location and course.
The sternalis muscle was present in 347 (5.8 %) of 6,000 adults. This muscle was more common in males (6.0 %, 187/3091) than in females (5.5 %, 160/2909). Among the 347 adults, 118 (34.0 %) had bilateral sternalis muscles; 148 (42.7 %) had right sternalis muscles; and 81 (23.3 %) had left sternalis muscles. The sternalis muscle was either flat or nodular and located superficial to the major pectoral muscles on CT axial transverse images. According to the muscle morphology and course, we classified sternalis muscles as three different types and nine subtypes. The muscles appeared with a single head and single belly in 58.5 %, double or multiple heads in 18.1 %, and double or multiple bellies in 23.4 %. The mean length, width and thickness were 111.1 ± 33.0, 17.7 ± 9.9 and 4.1 ± 1.7 mm measured on MDCT.
The sternalis muscle was highly prevalent in normal Chinese adults. MDCT is an effective method to demonstrate this muscle in vivo.
使用多排螺旋计算机断层扫描（MDCT）分析中国人群中胸骨肌的患病率、解剖特征及变异情况。
我们回顾性分析了6000例成人轴向MDCT图像，以确定胸骨肌的总体患病率及按性别划分的患病率。我们还分析了其单侧患病率及解剖特征，包括形状、大小、位置和走行。
6000例成人中，有347例（5.8%）存在胸骨肌。该肌肉在男性中（6.0%，187/3091）比在女性中（5.5%，160/2909）更常见。在这347例成人中，118例（34.0%）有双侧胸骨肌；148例（42.7%）有右侧胸骨肌；81例（23.3%）有左侧胸骨肌。在CT轴向横断图像上，胸骨肌呈扁平或结节状，位于胸大肌浅层。根据肌肉形态和走行，我们将胸骨肌分为三种不同类型和九个亚型。肌肉单头单腹出现的占58.5%，双头或多头出现的占18.1%，双腹或多腹出现的占23.4%。在MDCT上测量，其平均长度、宽度和厚度分别为111.1±33.0、17.7±9.9和4.1±1.7mm。
胸骨肌在正常中国成年人中患病率较高。MDCT是在活体中显示该肌肉的有效方法。
