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目的：提高对少见部位骨巨细胞瘤的正确诊断。材料与方法：搜集21例经手术病理证实的少见部位骨巨细胞瘤进行回顾性分析，男性9例，女性12例。年龄13～77岁。20例摄X线平片，10例行CT扫描。结果：21例中膨胀性囊性骨破坏12例，溶骨性骨破坏9例；偏心性生长3例，软组织肿块7例，小梁形成4例，侵犯邻近骨骼3例；多中心2例，肺和肋骨转移1例，术后复发1例。结论：对于少见部位巨细胞瘤的诊断，平片有重要价值，CT扫描优于平片。
Objective: To improve the diagnosis of rare giant cell tumor of bone. Materials and Methods: A retrospective analysis was performed on 21 cases of giant cell tumor of bone, a rare site confirmed by surgery and pathology. There were 9 males and 12 females. Age 13 to 77 years old. 20 cases of X-ray film, 10 cases of CT scan. Results: In 21 cases, 12 cases were destroyed by cystic bone destruction and 9 cases by osteolytic bone destruction. There were 3 cases with eccentric growth, 7 cases with soft tissue mass, 4 cases with trabecular bone formation, 3 cases with adjacent bone invasion, 2 cases with multiple centers, 1 case of lung and rib metastasis, 1 case of recurrence. Conclusion: For the diagnosis of rare parts of giant cell tumor, plain film has important value, CT scan is better than plain film.