Bauones Salem, Moraux Antoine
Department of Radiology, Hôpital Saint-Luc, Centre hospitalier de l'Université de Montréal (CHUM), 1058 rue Saint-Denis, Montreal, Québec, H2X 3 J4, Canada,
Skeletal Radiol. 2015 Sep;44(9):1273-8. doi: 10.1007/s00256-015-2153-1. Epub 2015 Apr 30.
To present the prevalence, clinical relevance, and ultrasound (US) and magnetic resonance imaging (MRI) appearances of the accessory coracobrachialis (ACB) muscle.
We present an US prospective study of the ACB muscle over a 2-year period. Five of the eight patients with suspected ACB on US were subsequently examined by MRI.
An ACB muscle was demonstrated by US in eight patients (eight shoulders), including seven females, one male, with mean age 39 years, over 770 (664 patients) consecutive shoulder US examinations referred to our institution yielding a prevalence of 1.04%. In dynamic US assessment, one case of subcoracoid impingement secondary to a bulky ACB was diagnosed. No thoracic outlet syndrome was encountered in the remaining cases. MRI confirmed the presence of the accessory muscle in five cases.
ACB muscle is a rarely reported yet not uncommon anatomic variation of the shoulder musculature encountered only in eight of 664 patients referred for shoulder US study. Its US and MRI appearance is described. One of our patients presented with subcoracoid impingement related to the presence of an ACB.
介绍副肱肌的患病率、临床相关性以及超声（US）和磁共振成像（MRI）表现。
我们对副肱肌进行了为期2年的超声前瞻性研究。超声检查怀疑有副肱肌的8例患者中有5例随后接受了MRI检查。
在770余例（664例患者）连续转诊至本机构进行肩部超声检查中，超声显示8例患者（8个肩部）存在副肱肌，其中包括7名女性和1名男性，平均年龄39岁，患病率为1.04%。在动态超声评估中，诊断出1例因副肱肌肥大导致的喙突下撞击症。其余病例未发现胸廓出口综合征。MRI证实5例存在副肌。
副肱肌是一种很少被报道但并不罕见的肩部肌肉解剖变异，在664例转诊进行肩部超声检查的患者中仅8例出现。描述了其超声和MRI表现。我们的1例患者因副肱肌出现了喙突下撞击症。
