Krieg James C, Mirza Amer
Department of Orthopaedic Surgery, Harborview Medical Center, 325 9th Avenue, Box 359798, Seattle, WA 98104, USA.
Clin Orthop Relat Res. 2009 Feb;467(2):566-71. doi: 10.1007/s11999-008-0501-3. Epub 2008 Sep 13.
Patella baja is a rare condition that can result from conditions involving trauma around the knee. Risk factors are believed to include scar tissue formation in the retropatellar fat pad, extensor mechanism dysfunction, and immobilization in extension. Early recognition and aggressive treatment are critical components in minimizing long-term disability. We present a case report of a woman with a fracture of the femoral diaphysis who underwent retrograde placement of an intramedullary nail. Subsequent followup revealed development of patella baja with resultant disability. The diagnosis was made late and the treatment was ineffective. Although patella baja has been reported in trauma around the knee, causative factors include retrograde femoral nailing. We believe early recognition and institution of treatment are important.
低位髌骨是一种罕见的病症，可由涉及膝关节周围创伤的情况引起。据信风险因素包括髌下脂肪垫瘢痕组织形成、伸肌机制功能障碍以及伸直位固定。早期识别和积极治疗是将长期残疾降至最低的关键因素。我们报告一例股骨干骨折女性患者，该患者接受了逆行髓内钉置入术。随后的随访显示出现了低位髌骨并导致残疾。诊断较晚且治疗无效。虽然低位髌骨在膝关节周围创伤中已有报道，但其致病因素包括逆行股骨交锁髓内钉固定。我们认为早期识别和开始治疗很重要。
