腹壁韧带样瘤的CT与MRI征象分析

The CT and MRI Features of Abdominal Wall Demoid Tumor

目的回顾性分析腹壁韧带样型纤维瘤病的CT和MRI表现,提高CT和MRI对该病的认识和诊断水平。方法回顾性分析经临床手术病理证实5例腹壁韧带样型纤维瘤病的临床、病理、CT和MRI特征。5例中2例行CT平扫和增强扫描;2例行MRI平扫及增强扫描;1例行CT、MRI平扫及增强扫描检查。分析其CT和MRI表现特征并与病理结果对照。结果 5例腹壁韧带样瘤均发生于前腹壁腹直肌内,4例位于左侧腹直肌内,1例位于右侧。CT、MRI表现:边界多不清,呈浸润性生长,无包膜;坏死或钙化少见;密度、信号可均匀或不均匀。注射造影剂后,4例较均匀强化,1例不均匀强化。CT表现缺乏特征性,而MRI扫描可见T2WI稍高信号及致密胶原纤维所致的低信号,具有一定特征性。结论 CT增强扫描检查可满足病变的检出与定位的要求;而MRI的优势在于其表现表现较具有特征性,对腹壁韧带样瘤病的术前诊断、鉴别诊断具有重要价值。

Objective To explore the computed tomography （CT） and magnetic resonance imaging （MRI） features of abdominal wall desmoid tumor, and improve the diagnostic accuracy and understanding of the disease. Methods The CT and MRI I）atures of 5 cases of surgically and pathologically confirmed desmoid tumor were reviewed retrospectively. Among the patients, 2 received CT pre- and post-contrast scanning, and 2 patients had MRI pre- and post-contrast scanning, and 1 received both. The CT and MRI features were analyzed in comparison with the pathological findings. Results In the 5 cases, 4 lumors occurred in the left rectus abdominis and the other in the right rectus abdominis. On CT and MRI, the border of the lesion was unclear without encapsulation and with scarce necrosis and calcification. The density and signal intensity of the tumor were well distributed. Four patients displayed obvious enhancement and 1 showed uneven enhancement. The CT fatures were unspecific. However. the MR findings of slightly high or low T2 signal intensity are characteristic. Conclusion Contrast-enhanced CT scan can meet the lesion detection and localization requirements. The MRI features of desmoid-type fibromatosis is characteristic, and MRI are valuable modalities for the diagnosis and differential diagno- sis of the tumor.