The impact of pylorus preservation on the development of nonalcoholic fatty liver disease after pancreaticoduodenectomy: A historical cohort study.

ABSTRACT

BACKGROUND/PURPOSE: The pathophysiology and associated factors of nonalcoholic fatty liver disease (NAFLD) after pancreaticoduodenectomy (PD) remain elusive. We aimed to investigate these factors, including the operation type, for NAFLD development after PD. METHODS: This historical cohort study included 786 consecutive patients treated with either classic Whipple operation or pylorus-preserving pancreaticoduodenectomy (PPPD) in Korea between 2012 and 2018. De novo NAFLD was determined based on hepatic attenuation in nonenhanced computed tomography during follow-up. RESULTS: Of the 786 patients, 216 (27.5%) had a newly developed NAFLD at 2 years after PD. The incidences of newly developed NAFLD at 0.5, 1, 1.5, and 2 years were 13 (1.7%), 41 (5.2%), 48 (6.1%), and 114 (14.5%), respectively. The Whipple group showed a significantly higher incidence of NAFLD than the PPPD group (40.3% vs 24.5%, P < .001). Seventeen patients (2.2%) had severe fatty liver with abnormal liver enzymes. Multivariable analysis revealed that Whipple operation (vs PPPD; adjusted odds ratio [AOR] 1.92, P < .001) and high preoperative body mass index (vs normal; AOR 1.71, P = .001) were independently associated with a higher risk of NAFLD. CONCLUSION: The incidence of NAFLD was 27.5% at 2 years after PD. Undergoing Whipple operation and high preoperative body mass index were significantly associated with de novo NAFLD development.