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A 20-year-old male patient with chondroblastoma of the left femoral head
患者，男，20 岁，左股骨头软骨母细胞瘤
a. 术前 X 线片；b. 术前 CT；c. 术前 MRI；d. 术后 2 个月 X 线片；e. 术后 2 年 X 线片；f. 术后 2 年关节功能（下蹲）
a. Preoperative X-ray film; b. Preoperative CT; c. Preoperative MRI; d. X-ray film at 2 months after operation; e. X-ray film at 2 years after operation; f. Joint function (squatting) at 2 years after operation
