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目的分析盆腔孤立性纤维瘤的CT、MRI特点并与病理结果进行对照,以提高对此疾病的认识及诊断水平。方法回顾性分析6例经手术病理证实的盆腔孤立性纤维瘤的CT、MRI资料,观察病灶的形态、密度/信号特征并与病理形态学表现进行对照。结果 6例中4例行CT检查,2例行MRI检查,全部病灶均边界清,呈圆形或椭圆形。CT平扫3例病灶呈稍低密度,内可见片状、灶状更低密度区;1例呈均匀等密度。4例病灶内均未见钙化。2例行常规增强扫描者,病灶呈明显不均匀“地图”样强化。2例行动态增强扫描者,1例动脉期轻度、均匀强化,门静脉期及延迟期未见持续性、延迟强化或排出征象;1例动脉期呈轻度不均匀强化,门静脉期及延迟期呈持续性强化及延迟性强化,并且在门静脉期显示排出征象。MR平扫T1WI上,1例病灶呈不均匀稍低信号;另1例呈均匀等信号。T2WI上,1例呈等、低、高混杂信号;另1例以高信号为主。增强扫描1例呈明显不均匀“地图”样强化,1例呈明显均匀强化。结论盆腔孤立性纤维瘤影像学表现多样,缺乏特异性征象,确诊仍需病理学及免疫组织化学检查。
Objective To analyze the features of CT and MRI in pelvic solitary fibrous tumor and to compare with the pathological findings to improve the understanding and diagnosis of this disease. Methods The CT and MRI data of 6 cases of pelvic solitary fibrous tumor confirmed by surgery and pathology were retrospectively analyzed. The morphology, density and signal characteristics of the lesions were observed and compared with the pathological findings. Results Of the 6 cases, 4 cases underwent CT examination and 2 cases underwent MRI examination. All lesions were clear and round or oval in shape. 3 cases of CT plain lesions showed a slightly lower density, visible within the flake, lesion-like areas of lower density; 1 case was uniform density. No lesions were found in 4 cases of calcification. 2 routine enhanced scanners, lesions were significantly uneven “map ” like enhancement. 2 routine dynamic contrast-enhanced scan, 1 case of mild and uniform arterial phase, portal phase and delayed phase showed no persistent, delayed enhancement or discharge signs; 1 case of mild heterogeneous arterial enhancement, portal venous phase and delay Persistent enhanced and delayed enhancement, and signs of discharge in the portal vein signs. MR plain T1WI, 1 case was slightly uneven signal lesions; the other 1 cases were uniform and other signals. On T2WI, 1 case showed equal, low and high mixed signals; the other 1 case was mainly high signal. One case of enhanced scan was significantly uneven, “map ” like enhancement, 1 case was significantly uniform enhancement. Conclusions Pelvic solitary fibrous tumor has various imaging features and lack of specific signs. Pathological examination and immunohistochemical examination are still required.