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Flow chart for determining the treatment strategy for pancreatic ductal adenocarcinoma during COVID-19 pandemic. 1High CA19-9 level, large primary tumor, suspicion of reginonal lymph nodes metastasis excessive weight loss, and extreme pain in accordance with NCCN guideline 2019[22]. PDAC: Pancreatic ductal adenocarcinoma; RPDAC: Resectable PDAC; BRPDAC: borderline resectable PDAC; LAPDAC: Locally advanced PDAC; NAT: Neoadjuvant treantment.
