MacKay James W, Whitehead Harry, Toms Andoni P
Department of Radiology, Norfolk & Norwich University Hospital, Norwich, United Kingdom.
Clin Anat. 2014 Oct;27(7):1097-102. doi: 10.1002/ca.22420. Epub 2014 Jun 3.
The anterior cruciate ligament (ACL) has traditionally been described as having two bundles--one anteromedial and one posterolateral. This has been challenged by studies proposing the existence of a third, intermediate, bundle with distinct functional significance, an arrangement that has been described in a number of domesticated animal species. No radiological evidence for the triple bundle ACL has previously been described. A prevalence study was carried out on 73 consecutive human knee magnetic resonance (MR) studies to determine the number of visible bundles, excluding individuals with a history of ACL injury or mucoid degeneration. A triple bundle ACL was demonstrated in 15 out of 73 human knees (20.5%, 95% confidence interval 12.9-31.2%). This is the first radiological description of the human triple bundle ACL. There was MR imaging evidence of a triple bundle ACL in approximately one fifth of human knees in this study.
传统上，前交叉韧带（ACL）被描述为有两束——一束前内侧束和一束后外侧束。然而，有研究对这一观点提出了挑战，这些研究认为存在第三束，即中间束，且具有独特的功能意义，这种结构在一些家养动物物种中已有描述。此前尚未有关于三束ACL的影像学证据报道。本研究对73例连续的人体膝关节磁共振（MR）检查进行了一项患病率研究，以确定可见束的数量，排除有ACL损伤或黏液样变性病史的个体。在73例人体膝关节中，有15例（20.5%，95%置信区间12.9 - 31.2%）显示为三束ACL。这是对人体三束ACL的首次影像学描述。在本研究中，约五分之一的人体膝关节有MR成像证据显示存在三束ACL。
