<h3>男/31岁，无明显外伤史，右膝关节疼痛和无力。</h3> <h3>前交叉韧带肿胀增粗，股骨侧明显。呈长T1和长T2弛豫信号。韧带内纤维分离，无纤维中断。</h3> <h3>关节内未见积液肿胀。关节软骨、半月板和侧副韧带未见损伤征象。</h3> <h3>前交叉韧带股骨外侧髁附着点囊肿，短径3mm，周边轻度水肿。</h3> <h3>交叉韧带黏液样变性，原因不明，发病平均年龄约40岁，男性略多。常并发韧带内和附着点处骨内腱鞘囊肿。影像上需要与韧带撕裂或断裂鉴别。前抽屉Lachman实验阴性，关节镜下韧带无断/撕裂。</h3> <h3>参考文献</h3><h3>Bergin D, Morrison WB and Carrino JA. et al. Anterior Cruciate Ligament Ganglia and Mucoid Degeneration: Coexistence and Clinical Correlation. AJR Am J Roentgenology. 2004; 182(5): 1283-1287</h3>