儿童臀部硬纤维瘤的影像表现

目的:探讨臀部硬纤维瘤的超声、CT、MRI表现特征。材料和方法:搜集10例经手术病理证实的儿童臀部硬纤维瘤病例,均行超声、CT平扫及增强扫描,5例行MRI检查,分析其影像学特点。结果:臀部硬纤维瘤主要累及臀部肌肉、筋膜、骨膜等,呈浸润性生长,易复发。超声表现为不规则低回声肿块。CT表现为低密度软组织肿块(9例),等高密度肿块(1例),强化程度不等。MRI表现为臀部肿块,T1WI等低信号,T2WI多为稍高信号夹杂斑片低信号(3例),或等低信号(2例),增强后可见不均匀强化。结论:超声、CT及MRI检查可显示硬纤维瘤的大小、形态;MRI能从多个切面显示肿瘤范围以及周围组织受侵情况,并可推断组织成分,为临床治疗提供重要信息。

Imaging Manifestation of Hip Desmoid Tumor in Children

Purpose: To investigate the ultrasonographic, CT and MRI manifestations of hip desmoid tumor. Materials and Methods: The imaging findings of 10 cases with hip desmoid tumor pathologically proved were retrospectively analyzed. Ultrasonographic and CT scans were performed in all cases, MRI in 5 cases. Results: On imaging, most lesions involved hip muscle, fascia and periosteum,with high recurrence rate. The desmoid tumor was irregular low echo mass on ultrasonographic. The tumor was low density (9 cases) and equal or high density (1 case) on CT scan. Most of them were low or equal signal intensity on T1-weighted images,3 cases were high signal intensity and 2 cases were low or equal signal intensity on T2-weighted images. There was mild or moderate enhancement in tumor after administration of a bolus of contrast medium. Conclusion: CT,MRI and ultrasonography can display the size, shape of hip desmoid tumor,MRI can discover the extent of mass and infiltrated adjacent organization clearly, which are helpful for clinical treatment.