Department of Rheumatology, Centre Viggo Petersen, Lariboisiére Hospital, the Public Assistance Hospital of Paris, (AP-HP), Paris, France.
Scand J Rheumatol. 2010;39(1):93-6. doi: 10.3109/03009740903061428.
OBJECTIVE: Fractures occurring at the site of a tophus have rarely been described in gout. In this paper we review the occurrence, clinical features, and outcome of fractures in tophaceous gout. METHOD: A PubMed search was conducted to identify the relevant literature, following our experience with two patients who developed tophaceous fractures after minor or no trauma. RESULTS: A total of 13 patients were analysed. Eleven cases of tophaceous fracture have been reported since 1950. Common features are: known and long-standing gout with tophi; minor or absence of trauma; specific locations include seven patients with patella bone fractures. Other sites include the cervical spine in two patients, the first and fifth metatarsal, and a phalanx in one patient each, the ilium and pubic bones in one, the medial malleola, and the femoral neck in the latter case. CONCLUSIONS: Monosodium urate (MSU) crystals can contribute to bone lesions by reducing osteoblastic activity and are associated with enhanced osteoclast activity in the vicinity of tophi. Mild trauma triggers MSU crystal release from tophi, resulting in cell activation and production of cytokines and proteases. This could enhance bone erosion leading ultimately to bone fragility and fracture. Our cases exemplify a rare cause of spontaneous fracture. Gouty tophus should be considered when facing a lytic lesion with fracture.
目的:在痛风中,很少有报道指出在痛风石部位发生的骨折。本文我们回顾了痛风石性痛风中骨折的发生、临床特征和转归。
方法:我们通过 PubMed 检索,结合我们遇到的 2 例轻微或无创伤后发生痛风石性骨折的患者经验,来确定相关文献。
结果:共分析了 13 例患者。自 1950 年以来,已有 11 例痛风石性骨折的病例报告。共同特征包括:已知的、长期的痛风伴痛风石;轻微或无创伤;特定部位包括 7 例髌骨骨折,还有 2 例颈椎骨折,1 例第一和第五跖骨骨折,1 例指骨和趾骨骨折,1 例髂骨和耻骨骨折,1 例内踝骨折,1 例股骨颈骨折。
结论:单钠尿酸盐(MSU)晶体通过降低成骨细胞活性并与痛风石附近破骨细胞活性增强有关,从而导致骨病变。轻微创伤会导致 MSU 晶体从痛风石中释放出来,引发细胞激活和细胞因子及蛋白酶的产生。这可能会增强骨侵蚀,最终导致骨脆弱和骨折。我们的病例为自发性骨折的罕见病因提供了范例。当面临伴有骨折的溶骨性病变时,应考虑痛风石性痛风。
Scand J Rheumatol. 2010
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