胰腺转移瘤的CT特点

CT Characteristics of Pancreatic Metastases

目的:探讨和分析胰腺转移瘤的CT特点。方法:回顾性分析18例胰腺转移瘤的CT表现,并进行文献复习。结果:10例表现为单发结节,6例为多发结节,2例为弥漫性病变;多发生于胰腺体尾部。16例结节型转移瘤共发现34个病灶,其中低密度灶15个,等密度灶18个,囊性灶伴钙化1个;增强扫描21个病灶呈均匀强化(轻度16个、明显5个),13个病灶呈边缘强化(轻、中度各4个,明显5个)。2例弥漫型转移瘤表现为胰腺弥漫性低密度灶,增强后呈轻度均匀强化。胰周血管受累及主胰管轻度扩张各3例,胰胆管明显扩张1例。结论:胰腺转移性肿瘤的CT表现具有一定特征性,结合原发癌病史有利于胰腺转移瘤的诊断。

Purpose： To discuss and analyze the CT characteristics of pancreatic metastases. Methods： The CT features of pancreatic metastases in 18 cases were retrospectively analyzed, and literature review was conducted. Results： The metastases were solitary in 10 patients, multiple in 6 patients, diffuse in 2 patients, and were usually located at the body and tail of pancreas. Sixteen cases of nodular metastases were found with 34 lesions. The metastases were hypodense in 15 patients, isodense in 18 patients and cystic lesion with calcification in 1 patient. On contrast enhanced CT, enhancement pattern was homogeneous in 21 lesions （16 lesions with mild enhancement,5 lesions with obvious enhancemen0,rim enhancement in 13 lesions （mild or moderate enhancement in 4 lesions, 5 lesions with obvious enhancement）. Two cases of diffuse metastatic tumors were with diffused hypodense lesions, and were with mild homogeneous enhancement. Involvement of extrapancreatic vessels and mild dilatation of the main pancreatic duct were showed in 3 patients respectively, and 1 patient had evidently dilatation of biliary and pancreatic duct. Con- elusion： Pancreatic metastases had certain specific CT characteristics, which would be diagnosed well by combining them with the primary cancer history.