Abstract：
METHODS: There is an increasing emphasis on adverse reactions to metal debris around prosthetic hip implants. We present a case report of a patient with increasing pain around a previous total hip arthroplasty and magnetic resonance imaging findings consistent with a pseudotumor. Serum metal ion levels were not elevated and initial biopsy findings inconclusive. The patient was diagnosed with an extraskeletal chondrosarcoma after revision total hip arthroplasty and subsequently underwent external hemipelvectomy with negative margins.
CONCLUSIONS: This report highlights the importance of remaining vigilant for malignant sarcomas presenting as pseudotumors around hip replacements, particularly in the absence of abnormal metal ion levels or definitive biopsy results.
CONCLUSIONS: This report highlights the importance of remaining vigilant for malignant sarcomas presenting as pseudotumors around hip replacements, particularly in the absence of abnormal metal ion levels or definitive biopsy results.
摘要：
方法：假体髋关节植入物周围金属碎片的不良反应越来越受到重视。我们提供了一例病例报告，该患者在先前的全髋关节置换术前后疼痛加剧，磁共振成像发现与假瘤一致。血清金属离子水平没有升高，最初的活检结果尚无定论。患者在翻修全髋关节置换术后被诊断为骨外软骨肉瘤，随后接受了切缘阴性的外部半盆切除术。
结论：本报告强调了对髋关节置换周围表现为假瘤的恶性肉瘤保持警惕的重要性，特别是在没有异常金属离子水平或明确活检结果的情况下。
结论：本报告强调了对髋关节置换周围表现为假瘤的恶性肉瘤保持警惕的重要性，特别是在没有异常金属离子水平或明确活检结果的情况下。
