Department of Orthopaedic Surgery, Kyushu University, 3-1-1 Maidashi, Fukuoka 812-8582, Japan.
Skeletal Radiol. 2010 Feb;39(2):185-8. doi: 10.1007/s00256-009-0750-6.
A 73-year-old female suffered from right hip pain without any history of antecedent trauma. The initial radiograph showed a slight narrowing of the joint space in the right hip. The patient was treated by non-weight bearing for 5 weeks. Radiographs obtained 3 months after the onset of pain showed the progression of both the joint-space narrowing and subchondral collapse at the superior portion. T1-weighted MR (magnetic resonance) images obtained 3 months after the onset revealed an irregular-shaped low-intensity area just beneath the articular cartilage as well as a low-intensity band, which was concave to the articular surface. A total hip replacement was performed. A histopathological examination revealed fracture callus and granulation tissue in the subchondral area. This subchondral fractured area was surrounded by vascular rich granulation tissue and fibrous tissue, which corresponded to the concave-shaped low-intensity band observed on the T1-weighted image.
一位 73 岁女性因右侧髋部疼痛就诊，无外伤史。初始 X 线片显示右侧髋关节间隙轻度变窄。患者接受了 5 周的不负重治疗。疼痛发作 3 个月后的 X 线片显示关节间隙狭窄和上部分的软骨下塌陷均有进展。疼痛发作 3 个月后获得的 T1 加权磁共振（MR）图像显示关节软骨下有一个不规则形状的低信号区，以及一个向关节面凹陷的低信号带。行全髋关节置换术。组织病理学检查显示软骨下区域有骨折骨痂和肉芽组织。该软骨下骨折区域被富含血管的肉芽组织和纤维组织包围，与 T1 加权图像上观察到的凹陷状低信号带相对应。
