孤立性纤维性肿瘤(solitary fibrous tumor,SFT)是一种少见的间叶源性肿瘤,好发于胸膜腔,也可发生于胸膜外全身其他部位。胸膜外SFT形态类似于胸膜SFT,大多数SFT的生物学行为呈良性或交界性,恶性SFT临床罕见。SFT绝大多数为孤立性实质性肿块,圆形或不规则形,呈膨胀性生长,界限清楚;恶性者常 Solitary fibrous tumor (solitary fibrous tumor, SFT) is a rare mesenchymal tumor, occur in the pleural cavity, but also in other parts of the extrapleural body. Pleural SFT morphology similar to pleural SFT, most of the biological behavior of SFT was benign or borderline, malignant SFT rare. SFT vast majority of solitary lumps, round or irregular shape, was swollen growth, clear boundaries; often