Rosenberg Z S, Cheung Y Y, Beltran J, Sheskier S, Leong M, Jahss M
Radiology Department, Hospital for Joint Diseases, New York, NY 10003, USA.
AJR Am J Roentgenol. 1995 Aug;165(2):387-90. doi: 10.2214/ajr.165.2.7618563.
The purposes of this study were to delineate the normal anatomy and MR imaging features of the posterior intermalleolar ligament--a normal ligamentous variant of the posterior portion of the ankle--and to identify normal anatomic characteristics that may account for the role of the ligament in the development of posterior impingement syndrome.
The prevalence, size, and shape of the posterior intermalleolar ligament were documented in 36 cadaveric ankles and in 97 MR studies of the ankle in patients with and without symptoms.
The posterior intermalleolar ligament was identified in 20 (56%) of the 36 cadaveric feet. It was 1-8 mm wide, and its diameter (anterior to posterior) was 5-8 mm. The ligament often resembled a meniscus, and in one case its anterior lip herniated into the ankle joint. The posterior intermalleolar ligament was detected in 18 (19%) of the 97 MR studies of the ankle. It was visualized on coronal T1- or T2-weighted images as a distinct, hypointense band traversing between the posterior talofibular ligament and the inferior transverse ligament.
The posterior intermalleolar ligament is a normal variant of the posterior ligaments of the ankle and is present in a significant number of persons. It is best seen on coronal T1- and T2-weighted MR images. Its meniscuslike shape and occasional extension into the ankle joint may account for the development of posterior impingement syndrome in susceptible persons.
本研究旨在描绘踝后踝间韧带（踝关节后部的一种正常韧带变异）的正常解剖结构和磁共振成像（MR）特征，并确定可能解释该韧带在后部撞击综合征发生中作用的正常解剖学特征。
记录36例尸体踝关节以及97例有症状和无症状患者踝关节MR研究中踝后踝间韧带的发生率、大小和形状。
36例尸体足部中有20例（56%）发现踝后踝间韧带。其宽度为1 - 8毫米，前后径为5 - 8毫米。该韧带常类似半月板，1例其前唇疝入踝关节。97例踝关节MR研究中有18例（19%）检测到踝后踝间韧带。在冠状位T1加权或T2加权图像上，它表现为一条清晰的低信号带，横跨于距腓后韧带和下横韧带之间。
踝后踝间韧带是踝关节后部韧带的一种正常变异，在相当一部分人中存在。在冠状位T1加权和T2加权MR图像上显示最佳。其半月板样形状及偶尔延伸至踝关节内可能是易感人群发生后部撞击综合征的原因。
