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The aim of this study was to evaluate risk factors for nonalcoholic fatty liver disease (NAFLD) after pancreaticoduodenectomy (PD), with a special focus on remnant pancreatic volume (RPV) as assessed using computed tomography (CT).From February 2004 to June 2017, 101 patients who underwent PD in our institution were enrolled. We defined a CT attenuation value of less than 40 HU as hepatic steatosis and measured RPV at 7 days, 3 months, and 1 year after PD using the SYNAPSE VINCENT system. The incidence of NAFLD and RPV were compared between the two groups according to reconstruction with pancreaticogastrostomy (PG) or pancreaticojejunostomy (PJ).The incidence of NAFLD at 3 months after PD was 39.6% (40/101). The RPV ratio (RPV at 3 months or 1 year divided by RPV at 7 days after PD) at both 3 months and 1 year was significantly smaller in the PG group than in the PJ group (59% vs 73%,Atrophic change in the remnant pancreas is significantly associated with the development of NAFLD, and PJ reconstruction may be superior to PG from the viewpoint of NAFLD development.