胰腺内分泌肿瘤的CT、MR诊断探讨

Diagnosis and misdiagnosis of pancreatic endocrine tumor by CT and MR

目的:提高CT、MR对胰腺内分泌肿瘤(pancreaticendocrinetumor,PET)表现的认识,避免误诊、漏诊。方法:回顾65例经手术及病理证实的PET影像学定位结果,探讨PET的CT、MR表现和特点并分析误诊、漏诊原因。结果:两种检查方法定位的敏感度和准确度在CT分别为86.9%和81.5%,MR为85.7%和77.4%。结论:CT、MR对PET的检出准确度高,肿瘤邻近血管、蒂状突出及非高密度病灶是造成误诊和漏诊的潜在因素。

Objective To improve the knowledge of CT and MR findings of pancreatic endocrine tumors （PETs） and to avoid the misdiagnosis. Methods The interpretations of radiological localizations were reviewed in 65 patients with PETs confirmed by surgery and pathology postoperatively. The radiological appearance and characteristics of PETs, and causes of misdiagnosis were also discussed. Results The sensitivity and the accuracy for preoperative localization was 86.9% and 81.5% by CT, and 85.7% and 77.4% by MR. Conclusions CT and MR have moderate accuracy in the detection of PETs. Potential causes of the false-negative results include tumors adjacent to vessels, pedunculated morphology and nonhyperattenuating lesions.