股骨颈疝窝的X线平片、CT、MRI表现

X-ray,CT and MRI Findings of Herniation Pit of the Femoral Neck

目的:探讨股骨颈疝窝的X线平片、CT及MRI影像表现。材料和方法:回顾性分析14例临床确诊股骨颈疝窝患者的髋关节9例X线平片、12例CT和10例MRI的表现。结果:14例股骨颈疝窝中,双侧4例、单发左侧7例和单发右侧3例。病灶均位于股骨头基底和股骨颈近段前外侧皮质下,呈圆形、类圆形或分叶状,最大径5～11mm平均8?。X线平片表现为边缘清晰锐利透光区。CT表现为边界清晰,周边有硬化环的低密度影,并见有一裂隙向外穿越邻近骨皮质。MRI因疝窝内容物成分不同而呈不同信号。结论:邻近皮质与病灶相通的裂隙样缺损是诊断股骨颈疝窝较为特异的征象。X线平片因图像重叠易漏诊,CT具有确诊价值,MRI具有辅助诊断价值。

Purpose： To evaluate imaging appearances of herniation pit of the femoral neck on X-ray, CT and MRI. Materials and Methotis ： analyzed retrospectively were The X-ray, CT and MRI findings of 14 patients with herniation pit of the femoral neck. Of 14 patients, X- ray plain films （9 cases）, CT scanning （ 12 cases） and MR scanning （ 10 cases） were performed. Results： Of 14 patients with herniation pit of the femoral neck, the bilateral hips were affected in the 4 patients, the right hips in the 3 patients, the left hips in the 7 patients. The diameter of the lesions ranged from 5 mm - 1 lmm（ mean 8 mm）. All located in the femoral head and neck near the basement of the anterior lateral cortex of the femur. X-ray plain films showed an osteolytic lesion with a sharp borders. CT scanning showed a low-density lesion surrounded by a sclerotic rim associaled with a small adjacent cortical defect. MR scanning showed different signal intersity according to the components of the lesions. Conclusions： A small fissure cortical defect between the lesion and the adjacent the cortical bone is the specific sign in the diagnosis of the herniation pit of the femoral neck. X-ray plain film has little value because of overlapping tissues, CT scanning has a definite values, MR scanning has the auxiliary value in defining the herniation pit of the femoral neck.