Splain S H, Ferenz C
Department of Orthopedic Surgery, Brookdale Hospital Medical Center, Brooklyn, New York.
Orthop Rev. 1988 Aug;17(8):802-5.
Rupture of the extensor mechanism of the knee is not an unusual occurrence. Bilateral simultaneous rupture, however, is rare. Most cases of bilateral simultaneous rupture occur in association with systemic disease, i.e., systemic lupus erythematosus, arteriosclerosis, diabetes, or secondary hyperparathyroidism. Only three cases without predisposing conditions have been reported. A case report of a 48-year-old black male without apparent risk factors who sustained spontaneous simultaneous rupture of the patella tendons is presented. Histologic evidence supports Davidsson's theory of multiple recurrent microtears within the tendon substance as a cause of rupture.
膝关节伸肌机制断裂并非罕见情况。然而，双侧同时断裂却很罕见。大多数双侧同时断裂的病例与系统性疾病相关，即系统性红斑狼疮、动脉硬化、糖尿病或继发性甲状旁腺功能亢进。仅有三例无诱发因素的病例被报道。本文报告一例48岁黑人男性，无明显危险因素，却发生了髌腱自发性同时断裂。组织学证据支持大卫松关于肌腱实质内多次反复微小撕裂是断裂原因的理论。
