Kim Tae Gyun, Heo Youn Moo, Min Young Ki
Department of Orthopedic Surgery, Konyang University College of Medicine, Daejeon, Korea.
J Hand Surg Asian Pac Vol. 2020 Mar;25(1):123-128. doi: 10.1142/S2424835520720042.
Extensor tendon rupture of the finger is a very rare complication of Kienböck's disease. However, advanced Kienböck's disease can cause an attritional rupture of extensor tendons due to displaced lunate fragment. An extensor tendon of the thumb is frequently damaged in the distal radial fracture, and an extensor tendon of the fifth finger is mainly ruptured in arthritis of distal radio-ulnar joint. On the other hand, the extensor tendons of the 2, 3 and 4 fingers are usually ruptured in advanced Kienböck's disease. We report two elderly patients diagnosed with advanced Kienböck's disease after non-traumatic rupture of extensor tendon of the fingers. Since the extensor tendon rupture in Kienböck's disease present as a loss of active extension of metacarpophalangeal joint in the central fingers, these patients should undergo imaging of the wrist joints to ascertain concomitant Kienböck's disease.
手指伸肌腱断裂是月骨无菌性坏死一种非常罕见的并发症。然而，晚期月骨无菌性坏死可因月骨碎片移位导致伸肌腱磨损性断裂。拇指伸肌腱常因桡骨远端骨折受损，而小指伸肌腱主要在远端桡尺关节关节炎时断裂。另一方面，2、3、4指伸肌腱通常在晚期月骨无菌性坏死时断裂。我们报告了两名老年患者，他们在手指伸肌腱非创伤性断裂后被诊断为晚期月骨无菌性坏死。由于月骨无菌性坏死中的伸肌腱断裂表现为中指掌指关节主动伸展丧失，这些患者应进行腕关节影像学检查以确定是否合并月骨无菌性坏死。
