前交叉韧带重建术后Cyclops病变的MRI表现

MRI Findings of Cyclops Lesion After Reconstruction of the Anterior Cruciate Ligament

目的分析膝关节前交叉韧带重建术后Cyclops病变的MRI表现及临床意义,旨在提高对其征象的认识。方法搜集具有典型Cyclops病变MRI征象的42例患者的MRI资料进行回顾性分析。男30例,女12例,平均年龄28.6岁。结果 Cyclops病变位于髁间窝前交叉韧带移植物止点前方,具有纤维组织的信号特征,T1WI上呈均匀低信号;在T2WI及质子密度加权成像(PDWI)上呈均匀等、低信号;MR关节造影图像上,在膝关节腔内高信号对比剂的衬托下可清晰勾勒其边缘形态。Cyclops病变的病理表现为增生变性的瘢痕样组织。结论 MRI是前交叉韧带重建术后Cyclops病变首选检查方法,有助于对该病变的诊断,对治疗方案的选择具有指导作用。

Objective To analyze the MRI appearance and clinical value of Cyclops lesion after reconstruction of the anterior cruciate ligament （ACL） of the knee and to improve the recognition of signs. Methods The MRI findings of 42 cases （30 males, 12 females, mean age of 28.6 years） with Cyclops lesion were retrospectively analyzed. Results MRI images showed abnormal soft tissue with signal characteristics consistent with fibrous tissue located anterior the reconstruc ted ACL in the intercondylar notch. Cyclops lesion appeared hypointensity on T1WI and isohypointensity on T2WI and PD WI. The images of MR Arthrography cleanly showed the edge of lesion by contrast agent. Scar tissue was the pathological change of Cyclops lesion. Conclusion MRI is the first choice for diagnosis of Cyclops lesion after reconstruction ACL of the knee and useful for clinic treatment.