患者 ,女 ,15岁。因左胫前疼痛 3个月入院。无明显诱因及外伤史 ,走路时疼痛加重。查体 :左胫骨前上1/ 3段内侧有核桃大隆起 ,质硬 ,不活动 ,轻压痛 ,穿刺未抽出液体。X线表现 :左胫骨上 1/ 3前缘自上斜向后下长约 6cm骨质结构紊乱 ,骨皮质似有增厚 ,密度减低 ,前下方骨皮质增 Patient, female, 15 years old. Pain in front of left ankle for 3 months. There was no obvious incentive and history of trauma. Pain increased when walking. Physical examination: There was a large uplift of walnut on the inside of the left upper part of the iliac bone 1/3, hard, inactive, light tenderness, and the puncture did not withdraw fluid. X-ray findings: Approximately 6 cm of the anterior border of the 1/3 of the left tibia from the upper oblique to the posterior longitudinal bone structure disorders, cortical bone thickening, reduced density, anterior lower cortical bone increased