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为了探讨盆部孤立性纤维性肿瘤(SFT)的多层螺旋CT(MDCT)和磁共振成像(MRI)表现特征及其病理学基础,收集手术病理证实的13例患者的临床资料,回顾分析其MDCT和MRI表现特征。13例中,6例仅行CT检查,5例仅行MRI检查,2例同时行CT和MRI检查。MDCT和MRI图像显示,病灶最长径为4.0~25.2cm(平均11.8cm);6例分叶状,7例圆形或卵圆形;所有病灶边界清晰,且均不同程度地压迫、推挤邻近的器官结构。行MDCT扫描者,平扫时表现为以等密度为主的软组织肿块,其中5例病灶内见片状低密度区。在MRI图像上,T1WI相主要表现为等信号,其中3例病灶内见片状低信号区,3例病灶中心见放射状低信号区,1例呈均匀等信号;T2WI相主要表现为混杂高信号,其中3例为不均匀高信号,3例病灶中心见放射状低信号区,1例均匀高信号。增强扫描时,13例中4例患者见粗大的供血血管。强化程度:1例轻度均匀强化;12例中-重度强化,其中7例病灶内见片状无强化区,3例病灶中心见放射状进行性强化区,2例均匀强化。病理组织学检查证实,放射状进行性强化区为胶原纤维成分。术后随访发现,2例患者存在局部复发,1例存在肝转移。总之,盆部SFT常表现为实性、边界清晰的富血供肿块,常伴不同程度的坏死和囊变,并推挤邻近的器官结构。病灶中心的胶原纤维在T2WI相表现为放射状低信号,增强时呈进行性强化,是该病变的重要特征,对诊断有重要价值。
To investigate the features of multi-slice spiral CT (MDCT) and magnetic resonance imaging (MRI) of the solitary fibrous tumor (SFT) in the pelvis and its pathological basis, the clinical data of 13 patients with surgically proven pathology were collected and retrospectively analyzed MDCT and MRI features. Of the 13 cases, only CT was performed in 6 cases, MRI in 5 cases and CT and MRI in 2 cases. MDCT and MRI images showed that the longest diameter of lesions was 4.0 ~ 25.2cm (average 11.8cm); lobes of 6 cases were round or oval in 7 cases; all the lesions had clear boundary and were oppressed and pushed to varying degrees Nearby organ structure. MDCT scan line, plain scan showed the same density of soft tissue mass, of which 5 cases of lesion see sheet-like low density. In the MRI images, the T1WI phase mainly showed equal signals, of which 3 showed low signal area in the lesion, 3 showed low signal area in the center of the lesion, and 1 showed homogeneous signal. The T2WI phase mainly showed mixed high signal , Of which 3 cases were non-uniform high signal, 3 cases of lesion center to see the radial low signal area, 1 case of uniform high signal. In the enhanced scan, 4 of 13 patients had gross blood vessels. The degree of enhancement: 1 case of mild uniform enhancement; 12 cases of moderate - severe enhancement, of which 7 cases showed flake no enhancement area, 3 cases of focus to see the radial enhancement of the area, 2 cases of uniform enhancement. Histopathological examination confirmed that the radial zone of progressive enhancement of collagen fibers. Follow-up postoperatively found that there were 2 cases of local recurrence, liver metastases in 1 case. In short, the SFT basin often showed solid, clear boundary rich blood for lumps, often accompanied by varying degrees of necrosis and cystic change, and promote the adjacent organ structure. Collagen fibers in the center of the lesion are characterized by a radial low signal in the T2WI phase and progressive enhancement in the enhancement, which is an important feature of the lesion and is of great value for diagnosis.