老年人无明显诱因髋关节疼痛警惕骨质疏松性股骨颈骨折（If elderly people experience hip joint pain without obvious causes, be alert to osteoporotic femoral neck fractures）

患者老年女性，肺气肿、脑出血病史（The patient is an elderly female with a history of emphysema and cerebral hemorrhage）

扭伤后2个月X片（An X-ray was taken two months after the sprain）

左半髋置换术后X片（X-ray after left hemihip replacement）

左半髋术后4个月，右髋疼痛，X片（Four months after the surgery on the left half of the hip, there was pain in the right hip. X-ray）

左半髋术后4个月，右髋疼痛，CT（Four months after the left hip surgery, there was pain in the right hip. CT）

左半髋术后8个月，无明显诱因右髋疼痛加重，CT（Eight months after the left hip surgery, the right hip pain intensified without any obvious cause. CT）

右半髋置换术后X片（X-ray after right hemiarthroplasty）

结论：老年人无明显诱因髋关节疼痛警惕骨质疏松性股骨颈骨折！若X片、CT均未发现明显骨折，需行MRI检查以排除隐匿性股骨颈骨折！（Conclusion: Elderly people with hip pain without obvious causes should be alert to osteoporotic femoral neck fractures! If no obvious fractures are found on X-rays and CT scans, MRI should be performed to rule out occult femoral neck fractures!）