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Imaging diagnosis of invasive ductal carcinoma of the pancreas:from conventional findings to morphological changes in early-stage disease Takuya Fukuzawa 1 1Department Radiology Shinshu University School of Medicine Keyword: 早期膵癌 , PanIN , 膵実質萎縮 pp.419-426
Published Date 2026/5/10
DOI https://doi.org/10.18888/rp.0000003121
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Prognosis of pancreatic invasive ductal carcinoma remains poor because most patients present with advanced disease. This review summarizes practical imaging fundamentals and recent updates for radiologists, emphasizing how to recognize early-stage cancer when a mass is unclear. In this article, protocol considerations and pitfalls on multiphase contrast-enhanced CT and MRI/MRCP are outlined. Key indirect signs include localized main pancreatic duct stricture or abrupt cutoff with upstream dilatation, focal parenchymal atrophy and fatty replacement, subtle delayed enhancement reflecting fibrosis, and diffusion restriction on MRI. It is important to compare images overtime carefully. We propose a checklist-based reading approach to avoid missing these indirect signs and to perform detailed examinations including endoscopic ultrasound and serial pancreatic juice aspiration cytology examination(SPACE)timely.


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電子版ISSN 印刷版ISSN 0009-9252 金原出版

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