患者女,65岁。头昏1月余,一般情况良好,神经系统检查未见异常,无颅脑外伤及其他异常病史。实验室检查无异常发现。影像学表现:X线平片示左侧顶骨椭圆形低密度骨质破坏,呈浅分叶状,边界清晰,内部密度较均匀,周围未见明显软组织肿块,病变与正常骨质分界清晰(图1)。头颅CT示:左侧顶骨板障可见大小约57 mm×52 mm×17 mm之椭圆形膨胀性骨质破坏区,病变向内外板方向均有膨胀,但以 Female patient, 65 years old. Dizziness in January, the general condition is good, no abnormal neurological examination, no traumatic brain injury and other abnormal medical history. No abnormal laboratory tests found. Imaging findings: X-ray showed the left parietal oval low-density bone destruction, was shallow lobular, clear boundaries, the internal density was uniform, no obvious soft tissue mass around the clear lesions and normal bone demarcation (Figure 1). Head CT showed: the left parietal bone barrier seen in the size of about 57 mm × 52 mm × 17 mm oval swelling of the destruction of the area, the disease has expanded both inside and outside the board, but to