病例资料:患者,男,46岁,左侧臀部疼痛伴左下肢无力1周入院就诊。查体左大腿前屈受限,左髋4字征阳性。影像学表现:X线平片示左侧髂骨翼可见斑片状溶骨性骨质破坏区,大小约65mm×86mm,病变边缘尚清晰,邻近骨质可见硬化(图1)。CT平扫病灶中CT值25Hu,增强扫描病灶CT值约40Hu,病变边缘局部骨皮质不连续,邻近骨质可见硬化,其周围可见软 Case Information: Patient, male, 46 years old, left hip pain with left leg weakness 1 week admission. Examination of left thigh flexion limited, left hip 4 sign positive. Imaging findings: X-ray showed the left iliac wing visible patchy osteolytic bone destruction area, the size of about 65mm × 86mm, the lesion edge is still clear, visible sclerosis adjacent to the bone (Figure 1). CT scan lesions CT value of 25Hu, enhanced CT scan CT value of about 40Hu, lesions at the edge of the cortical bone is not continuous, visible sclerosis adjacent to the bone around the soft