腹部侵袭性纤维瘤病的CT及MRI特征

目的：探讨腹内侵袭性纤维瘤病的CT及MRI特征。方法：回顾性分析18例经手术病理证实的腹内侵袭性纤维瘤病CT及MRI表现。术前仅行CT检查9例,仅行MRI检查3例,同时行CT及MRI检查6例。结果：18例腹内侵袭性纤维瘤病表现为腹膜后或腹腔内软组织肿块。腹膜后肿块以浸润性生长呈不规则形、爪形多见;腹腔内肿块以膨胀性生长呈圆形、类圆形多见。CT检查15例中,平扫病灶呈稍低密度11例,等密度4例,病灶内未见坏死、钙化及脂肪密度,增强扫描动脉期病灶大部分呈不均匀轻度强化,静脉期病灶持续强化,延迟期强化最明显,其中9例病灶周边及内部残留有斑片状、条状无强化稍低密度区。MRI检查9例中,T2WI病灶均呈稍高信号;T1WI呈等信号5例,呈稍低信号4例;脂肪抑制T2WI序列,病灶呈明显高信号。其中6例病灶在各序列中均见有条带状致密胶原纤维形成的低信号影。动态增强扫描动脉期及静脉期病灶轻中度不均匀强化,延迟期病灶明显强化。结论：腹内侵袭性纤维瘤病的CT及MRI表现具有一定特征性,CT、MRI检查对该病有较高的诊断价值。

CT and MRI feaatures of abdominal aggresive fibromatosis

Objective:To investigate the CT and MRI appearances of abdominal aggresive fibromatosis.Methods:CT and MRI findings of 18 patients with abdominal aggresseive fibromatosis proved by pathology were analysed retrospectively.9 patients undrewent only CT scan,3 patients underwent only MRI examination,and 6 patients underwent both CT and MRI scans.Results:The 18 cases presented as masses in the retroperitoneum and in the peritoneal cavity.The masses in the retroperitoneum were mostly infiltrative and irregular,wh...