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目的总结分支型胰腺导管内乳头状黏液性肿瘤(intraductal papillary mucinous neoplasms,IPMNs)的CT影像学特征及良恶性鉴别要点。方法回顾性分析18例经手术组织病理证实分支型IPMNs患者的CT影像资料。结果 CT表现为胰腺实质内单囊肿块4例,多囊肿块9例,囊实性肿块5例;4例肿块内可见点状、结节状钙化,7例伴胰管轻度扩张,1例伴胆管扩张;术前CT诊断恶性或交界性肿瘤的敏感性为66.7%,特异性为91.7%,准确率为83.3%。结论分支型IMPNs的CT表现具有一定特征性,仔细分析其影像学表现,对术前良恶性鉴别有一定参考价值。
Objective To summarize the CT features and the main points of benign and malignant differentiation of intraductal papillary mucinous neoplasms (IPMNs). Methods A retrospective analysis of 18 cases of pathologically confirmed branches of IPMNs CT image data. Results CT showed 4 cases of single cyst mass in the parenchyma of the pancreas, 9 cases of polycystic mass and 5 cases of cystic solid mass. Dot and nodular calcification were seen in 4 cases, slight expansion of pancreatic duct in 7 cases, With bile duct dilatation; preoperative CT diagnosis of malignant or borderline tumors was 66.7%, specificity was 91.7%, the accuracy rate was 83.3%. Conclusions The CT features of branching IMPNs have certain characteristics. Careful analysis of the imaging findings can be helpful for the differential diagnosis of benign and malignant tumors.