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患者男性，49岁，教师，于1993年10月第3次入院治疗。1972年12月，因右膝关节疼痛就诊入院，X线片示右胫骨上端6cm×5cm溶骨性破坏，以右胫骨上端骨肿瘤行刮除，自体骼骨植骨术，术后伤口IA愈合。出院后恢复正常工作，1974年4月肿物复发再次收住院，又行病灶刮除，同种异体植骨
The patient was a 49-year-old man, a teacher. He was admitted to hospital for the third time in October 1993. In December 1972, he was admitted to the hospital due to pain in his right knee. X-ray showed that the upper end of the right patella was 6cm × 5cm in lysis, and the upper humerus bone was scraped. The autologous iliac bone was grafted and the wound IA healed after surgery. After returning to normal work after discharge, he was admitted to hospital again after recurrence of tumor in April 1974, and the lesion was scraped again. Allogeneic bone grafting was performed.