节细胞神经瘤的CT和MRI诊断

CT and MRI diagnosis of ganglioneuroma

目的:分析节细胞神经瘤的影像表现特点,提高节细胞神经瘤影像诊断的准确性。方法:搜集经手术病理证实的21例节细胞神经瘤的CT和MRI资料,回顾性分析病灶的影像特点,并与组织病理学特征相对照。结果:所有病例均为单发病灶。4例位于后纵隔,9例位于肾上腺,8例位于腹膜后间隙,病灶平均大小约4.2cm,CT平扫为均匀或不均匀低密度,T1WI表现为不均匀低信号,T2WI表现为不均匀高信号,增强后不强化或轻度强化,延迟后可进行性增强,肿瘤包绕血管但管腔不狭窄,5例肿瘤内出现点状或条状钙化。结论:CT和MRI平扫及增强扫描能较好地显示节细胞神经瘤的内部结构和影像学特点,反映病灶的血供特点和病理特征,有助于其它病变进行鉴别。

Objective：To evaluate the imaging characteristics of ganglioneuroma and to improve the accuracy of diagnosis.Methods：CT and MRI data of 21 cases of ganglioneuroma confirmed by histopathology were collected.The imaging characteristics were retrospectively analyzed and compared with histological features.Results：All cases appeared as solitary lesion,in which 4 cases were located in the posterior mediastinum,9 cases in the adrenal gland and 8 cases in the retroperitoneum.The average diameter of the lesions was 4.2cm.Precontrast CT appeared hypodense.On MRI images the lesions displayed long T1 and long T2 signal.On contrast images,the tumors displayed no or slight enhancement.The lesions surrounded the vessels but didn′t invade them.Calcification was seen inside the tumor in 5 cases.Conclusion：Contrast CT and MRI can disclose inner structure and imaging characteristics of ganglioneuroma and demonstrate the pathological features of the lesion,therefore contributing to the differentiation of the disease.