胰胆管十二指肠连接区小肿瘤的MRI表现

目的：探讨胰胆管十二指肠连接区（ PDDU）小肿瘤的MRI表现特点，进一步提高MRI诊断的准确性。方法对连接区22例经病理证实的小肿瘤MRI图像资料进行分析。结果MRI诊断PDDU小肿瘤22例（胰头癌11例，壶腹癌5例，胆总管下端癌4例，乳头绒毛管状腺癌以及导管内乳突状粘液瘤各1例），主要表现为软组织肿块，十二指肠腔内充盈缺损，胆总管下段狭窄和肝内外胆管、胰管、胆总管扩张。结论 MRI能清晰显示PDDU小肿瘤的直接及间接征象并具有一定的特征性，是一种优良的无创伤性检查方法。

MRI findings of Small Tumor at Pancreaitcobli iayr Ductala nd Duode nal Union

Objective Tostudythefeatures of MRI findingsin small tumors atpancreaticobiliaryductal andduodenal u-nion ( PDDU) .Methods MRI findingsfeaturesof 22 cases wereretrospectively studiedandcorrelatedwith theirpathologi-cal characteristics.Results Among 22 casesstudied(11 werecarcinoma of head of pancreas,5 wereampullarycarci-noma,4 were inferior extremity carcinoma of choledochus, It is every one of adenocarcinoma, duodenal papilla villous tubular adenocarcinoma and Intraductal Papillary Mucinous Adenoma);MRI featuresincluded massesofsoft tissue,local-ized duodenal intraluminal filling defect, inferior segment of choledochus stenosis or thickeningofcholedochuswall andex-pansionofexterior and interior bile duct,common bileductandpancreatic duct.Conclusions MRI is one of noninvasive superiortesting methods,which canclearly displaythedirectandindirectsigns of small tumors of PDDU.