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  • Title: Concomitant Pancreatic Ductal Adenocarcinoma and Type 1 Autoimmune Pancreatitis: A Potential Issue in the Diagnosis of Carcinoma by Endoscopic Ultrasound-guided Fine-needle Biopsy.
    Author: Kachi K, Naitoh I, Ban T, Hayashi K, Yoshida M, Hori Y, Natsume M, Kato A, Kito Y, Saito K, Matsuo Y, Kato H, Naiki-Ito A, Takahashi S, Notohara K, Kataoka H.
    Journal: Intern Med; 2023 Feb 15; 62(4):545-551. PubMed ID: 35831103.
    Abstract:
    We herein report a 64-year-old man with concomitant pancreatic ductal adenocarcinoma (PDAC) and type 1 autoimmune pancreatitis (AIP). An endoscopic ultrasound-guided fine-needle biopsy (EUS-FNB) from the pancreatic head mass revealed level 2 histology of AIP and atypical glands. We diagnosed definitive focal AIP using the clinical diagnostic criteria. Computed tomography revealed that the pancreatic mass had not been reduced by steroid therapy. Surgery was performed after a histological PDAC diagnosis was made via a transpapillary biliary biopsy. The resected specimen revealed PDAC associated with AIP. It is important to consider the cooccurrence of PDAC and AIP even if the histological diagnosis via an EUS-FNB is AIP.
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