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目的:探讨暂时性骨质疏松症的MRI表现。方法:对经临床证实的10例暂时性骨质疏松症(TOH)患者的临床及影像学资料进行回顾性分析。10例患者均行MRI平扫,其中5例行MRI增强扫描,4例行CT扫描。10例中男7例,女3例,年龄为25～40岁。结果:10例TOH中,双侧髋关节同时受累2例,单侧受累8例,主要MRI表现为弥漫性骨髓水肿,累及股骨头、颈及转子间,股骨头形态完整,1例可见软骨下应力性骨折,所有病例均无股骨头软骨下骨质缺损;关节囊肿胀和关节积液8髋;MRI增强扫描示病变区呈明显均匀强化。主要CT表现为股骨头骨密度弥漫性减低,骨皮质变薄。治疗5～11个月后患者疼痛症状消失,股骨内MRI信号恢复正常。结论:CT上表现为弥漫性骨质疏松、MRI表现为弥漫性骨髓水肿、缺乏软骨下骨质病变以及均匀一致强化是TOH性特征的影像学表现。
Objective: To investigate the MRI manifestations of transient osteoporosis. Methods: The clinical and imaging data of 10 clinically confirmed patients with transient osteoporosis (TOH) were analyzed retrospectively. All 10 patients underwent MRI plain scan, of which 5 underwent MRI enhanced scan and 4 underwent CT scan. 10 cases of male 7 cases, 3 females, aged 25 to 40 years. Results: In 10 cases of TOH, bilateral hip joint involvement occurred in 2 cases and unilateral involvement in 8 cases. The main manifestations of MRI were diffuse bone marrow edema, involving the femoral head, neck and rotor, the integrity of the femoral head, and 1 case of subchondral Stress fractures, all cases were no femoral head subchondral bone defect; joint capsule swelling and joint effusion 8 hips; MRI enhanced MRI showed lesions were significantly enhanced. The main CT showed diffuse femoral head bone density decreased cortical bone thinning. After 5 to 11 months of treatment, the pain symptoms disappeared and the MRI signals of the femur returned to normal. CONCLUSIONS: Diffuse osteoporosis on CT, diffuse bone marrow edema on MRI, absence of subchondral bone lesions, and homogeneous enhancement are TOH features.