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患者女,58岁。于20年前无明显诱因发现左膝关节肿物,大小约1 cm×1 cm×1 cm。两年前肿物渐增至5 cm×5 cm×5cm。无明显不适。体检:一般情况好,心肺及肝、胆、脾无异常,左膝前外方有一5 cm×5 cm×5 cm肿物,质硬,表面光滑,边界欠清楚,无活动,轻压疼。X线片显示:髌骨下方偏外肿物,占据整个髌下脂肪垫区域,边缘清楚,呈片状不均匀钙化影。上缘与髌骨下极紧密相连,部分延至髌骨关节面下端(图1)。诊断:左髌骨下方
Female patient, 58 years old. 20 years ago, no obvious incentive to find the left knee joint tumor, the size of about 1 cm × 1 cm × 1 cm. Two years ago, the tumor increased to 5 cm × 5 cm × 5 cm. No obvious discomfort. Physical examination: Generally good, heart and lung and liver, gallbladder, spleen and anomalies, left anteromedial foreign a 5 cm × 5 cm × 5 cm tumor, hard, smooth surface, the border is not clear, no activity, light pressure pain. X-ray showed: the outer patella partial tumor, occupy the entire area of the infrapatellar fat pad, the edge clear, uneven sheet calcification. The lower edge of the patella and the very close, some extend to the lower surface of the patella articular surface (Figure 1). Diagnosis: Left patella below