臀肌挛缩症的X线、CT征象及临床表现

The X-ray,CT Signs and Clinical Manifestation of Gluteal Muscle Contracture

目的:探讨臀肌挛缩症的X线、CT征象。方法:分析24例臀肌挛缩症的骨盆平片及其中11例骨盆CT片,并与21例非臀肌挛缩症的骨盆平片及其中8例CT片做对照。结果:24例臀肌挛缩症骨盆平片中,22例(91.7%)表现为双侧骶髂关节旁纵行、条状致密线,2例(8.3%)表现为单侧骶髂关节旁纵行、条状致密线;11例骨盆CT主要表现为:(1)臀肌体积缩小,10例(90.9%)为双侧,1例(9.1%)为单侧;(2)髂骨走形方向改变呈矢状,10例(90.9%)为双侧,1例(9.1%)为单侧;(3)臀部注射区臀肌钙化灶及条状挛缩带。结论:骶髂关节旁线状致密影是臀肌挛缩症的重要X线表现,CT能更直观地了解病变的范围及髂骨骨质改变,对临床早期诊断及术前评估具有重要意义。

Objective： To investigate the X-ray, CT signs and clinical manifestation of gluteal muscle contracture （GMC）. Methods： Pelvic radiograph of 24 GMC cases including CT radiograph of 11 GMC cases were analyzed and compared with pelvic radiograph of 21 non-GMC cases and CT radio- graph of 8 non-GMC cases among them. Results： Longitudinal dense linear shadows were found at the iliac site of sacroiliac joint in 24 cases with GMC, of whom 22 （91.7%） cases were bilateral and 2 （8.3 % ） cases were unilateral. The main CT signs in 11 cases with GMC were as follow ： （ 1 ） Gluteal muscle volume shrunk, 10 （90.9%） cases were bilateral and 1 （9.1%） cases were unilateral. （2） The normal direction of ilium were changed to sagittal direction, 10 （90.9%） cases were bilateral and 1 （9.1%） cases were unilateral. （3）Gluteal calcification and strip erispation fascia occurred in injection zones. Conclusion： The longitudinal dense linear shadows is very important X-ray imaging features of GMC. CT can intuitively evaluate the extent of GMC and the change of ilium, which is useful for the early diagnosis and preoperative evaluation.