腹部孤立性纤维瘤的CT表现与病理对照

The Comparative Study of CT Findings and Pathology in Abdominal Solitary Fibrous Tumor

目的探讨腹部孤立性纤维瘤(SFT)的CT表现及病理学特征。方法回顾性分析9例经手术病理证实的腹部SFT的CT表现,并与病理进行对照分析。结果 9例SFT中,位于腹腔1例,盆腔1例,同时位于腹腔和盆腔1例,腹膜后6例。肿瘤最大径5.9～30.2 cm。3例SFT形态不规则,6例呈椭圆形或分叶状。6例边界清楚,3例部分边界不清。9例均行CT平扫及增强检查,平扫2例密度均匀,7例密度不均匀,可见不规则低密度区;增强扫描,8例动脉期呈明显不均匀强化,门静脉期呈持续性强化,1例呈轻度强化。结论腹部SFT是一种罕见肿瘤,CT对该肿瘤的诊断和鉴别诊断有一定意义。

Objective To investigate the CT imaging characteristics and pathology features of abdominal solitary fibrous tumor（SFT）. Methods CT imaging features of 9 cases with abdominal SFI proved by pathology were retrospectively re viewed and compared with pathological results. Results Among the 9 lesions, 1 lesion was located in the abdominal cavi ty, 1 lesion in the pelvic cavity, 1 lesion in the both abdominal and pelvic cavity and 6 lesions in the retroperitoneum. The tumor size ranged from 5.9era to 30.2 em. 3 lesions were irregular and 6 were ellipse or lobulated. 6 tumors had wellde fined contours, the others showed illdefined contours. All the 9 cases underwent CT plain and enhanced scan. On unen hanced CT, the lesions in showed homogeneous density 2 cases, the others showed heterogeneous density with irregular low density areas. On enhanced CT, 8 lesions presented marked heterogeneous enhancement in the arterial phase and continu ous enhancement in the venous phase, the other lesion showed slight enhancement. Under the microscope, the hyper and hypocellular spindle cells were alternately distributed, mixed with collage fibers and staghom blood vessels. Positive im mnnohistochemieal staining ： CD34 88.9% （ 8/9 ）, Vimentin 100% （ 9/9 ）. Immunohistochemistry were all negative for S 100. Conclusion SFT is an extremely rare tumor. CT imaging plays an important role in the diagnosis and distinction be tween SFT and other tumors in abdomen.