Musculoskeletal Imaging and Intervention, Department of Radiology, Brigham and Women's Hospital, 75 Francis Street, Boston, MA 02115, USA.
Skeletal Radiol. 2012 Nov;41(11):1375-9. doi: 10.1007/s00256-012-1486-2. Epub 2012 Jul 12.
Tunnel cyst formation is a rare complication after anterior cruciate ligament reconstruction, usually occurring 1-5 years post-operatively, which may occasionally be symptomatic. There are multiple proposed theories regarding the etiology of tunnel cysts. Theories include necrosis, foreign-body reaction, lack of complete graft osteo-integration, and intravasation of articular fluid. It is important to know if the tunnel cysts are communicating or not communicating with the joint, as surgical management may be different. Imaging characteristics on magnetic resonance images (MRI) include tibial tunnel widening, multilocular or unilocular cyst formation in the graft or tibial tunnel, with possible extension into the pretibial space, intercondylar notch, and/or popliteal fossa. The MR imaging differential diagnosis of tibial tunnel cysts includes infection, foreign-body granuloma, or tibial screw extrusion. Importantly, to the best of our knowledge, graft failure or instability has not been reported in association with tibial tunnel cysts.
隧道囊肿形成是前交叉韧带重建后罕见的并发症，通常发生在术后 1-5 年，偶尔可能出现症状。关于隧道囊肿的病因有多种假说。这些假说包括坏死、异物反应、移植物不完全骨整合、关节液内渗。了解隧道囊肿是否与关节相通非常重要，因为手术治疗可能会有所不同。磁共振成像（MRI）上的影像学特征包括胫骨隧道增宽、移植物或胫骨隧道内的多房或单房囊肿形成，可能延伸至胫骨前间隙、髁间切迹和/或髌下窝。胫骨隧道囊肿的 MRI 鉴别诊断包括感染、异物肉芽肿或胫骨螺钉挤出。重要的是，据我们所知，与胫骨隧道囊肿相关的移植物失败或不稳定尚未见报道。
