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目的探讨低度恶性肌纤维母细胞肉瘤(LGMS)的影像特点及提高其影像诊断水平。方法回顾性分析8例经病理证实的LGMS的X线、CT、MRI表现。单种方法检查中,行X线平片检查1例,行CT及MRI检查各2例;3例行2种方法检查。结果 8例LGMS中,5例发生于软组织,3例发生在长骨;发生于软组织者,在CT上2例边界较清晰,2例可见大量不规则钙化影,3例行增强扫描,动脉期肿瘤均呈明显不均匀强化,仅有1例行静脉期扫描,肿瘤强化程度进一步增高,1例出现双肺转移,在MRI上,肿瘤呈长T1、长T2信号,增强扫描瘤体强化明显;发生于长骨者,在X线平片上呈斑片状、虫蚀样的溶骨性骨质破坏,未见硬化边、钙化及骨膜反应,在MRI上,肿瘤呈长T1、长T2信号,增强扫描肿瘤以外周强化明显,肿瘤中心区域未见强化。结论 LGMS发病率低,影像表现缺乏特征性,确诊需依靠病理检查。
Objective To investigate the imaging characteristics of low-grade myofibroblastic sarcoma (LGMS) and improve its diagnostic value. Methods We retrospectively analyzed the X-ray, CT and MRI findings of 8 pathologically confirmed LGMS. A single method of examination, line X-ray plain film in 1 case, line CT and MRI in 2 cases each; 3 cases were 2 ways to check. Results In 8 cases of LGMS, 5 cases occurred in soft tissue and 3 cases occurred in long bones. In soft tissue, there were 2 cases with clear border in CT, 2 cases with irregular calcifications, 3 cases with enhanced scan and arterial phase tumors All showed obvious heterogeneous enhancement. Only 1 patient underwent venous phase scan. The degree of tumor enhancement was further increased. One patient had bilateral lung metastases. On MRI, the tumor showed long T1 and long T2 signals, and the enhanced scan enhanced obviously The long bones, patchy on the X-ray, worm-like osteolytic bone destruction, no sclerosis, calcification and periosteal reaction, the tumor was long T1, long T2 signal, enhanced scan Tumors to peripheral enhancement, no enhancement of the tumor center area. Conclusion The incidence of LGMS is low, and the imaging features are lacking. The diagnosis depends on the pathological examination.