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患者男，６８岁。因右上臂疼痛月余，伤后功能受限１小时于１９９６年１１月２９日入院。Ｘ线片示：右肱骨中下段骨折，骨折远端可见２ｃｍ×１－５ｃｍ虫蚀样密度降低区，皮质变薄，无骨膜反应（图１）。诊断为骨囊肿并发病理性骨折。全麻下行骨囊肿刮除、植骨内固定术。术中?
Male patient, 68 years old. Due to more than a month of pain in the upper right arm, his post-injury function was restricted for one hour and was admitted on November 29, 1996. An X-ray film showed a fracture of the middle and lower segments of the right humerus. A 2 cm × 1–5 cm worm-like density-reduced area was seen at the distal end of the fracture, and the cortex became thinner without periosteal reaction (Fig. 1). Diagnosis of bone cysts and the incidence of rational fracture. General anesthesia bone cyst scraping, bone grafting and internal fixation. Intraoperative?