胸膜外孤立性纤维瘤CT和磁共振表现

目的探讨胸膜外孤立性纤维瘤（extrapleural solitary fibrous tumor，ESFT）的cT和MR表现。方法回顾性分析8例经病理证实的ESFT的CT和MRI表现。结果8例ESFT中，发生在眼眶和腹膜后各2例，小脑、肾脏、胰腺和食管各l例。cT或MRI表现为圆形或卵圆形肿块，4例密度或信号均匀，4例不均匀。增强后肿瘤实质区均明显强化。病理学检查肿瘤均由梭形细胞构成，免疫组织化学CD34阳性具有特征性。结论ESFT的CT和MRI表现呈多样化。增强扫描可提高诊断准确性。

CT and MRI appearance of extrapleural solitary fibrous tumor

Objective To explore the CT and MRI appearce of the extrapleural solitary fibrous tumor （ESFF） and improve the diagnostic level. Methods Eight cases of ESFT pathologically confirmed were analyzed retrospec- tively by CT and MRI. Results In the 8 ESFF patients, 2 of them were found in the orbits, 2 cases in the retroperi toneum, 1 case in the kidney, 1 case in the pancreas, 1 case in the digest system and 1 case in the cerebellum. CT or MRI showed a solitary round or oval mass in all 8 cases, 4 cases of uniform density or signal, and 4 cases uneven. After Enhanced scanning tumor parenchyma was significantly enhanced. Microscopically, ESFT was composed of spindle cells which were CD34 positive in the immunohistochemical test. Conclusion ESFT shows variable appear ance on CT and MRI, contrast-enhanced CT or MRI can provide more information about the lesions.