Pancreatology : official journal of the International Association of Pancreatology (IAP) ... [et al.] · 2025
Influence of prior bariatric surgery on pancreatic cancer stage at presentation and inpatient outcomes.
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Leslie Zachary D, Dirweesh Ahmed, Ali Yasmin, Ahmed Khalid, Wise Eric S, Freeman Martin, Amateau Stuart K
Аннотация
BACKGROUND & AIMS: Pancreatic cancer continues to have low five-year survival with late-stage diagnosis limiting surgical resection. Class III obesity is a well-established risk factor for pancreatic cancer, while bariatric surgery has been associated with reduced overall cancer incidence. However, the impact of bariatric surgery on pancreatic cancer presentation, treatment options, and outcomes remains poorly understood. We retrospectively evaluated national trends in pancreatic cancer among patients having class III obesity with and without prior bariatric surgery, focusing on metastasis, curative surgical management, and inpatient mortality.
METHODS: We used the National Inpatient Sample (2016-2022), to identify adult patients hospitalized with a primary diagnosis of pancreatic cancer and a history of either bariatric surgery or class III obesity. Patients were stratified by tumor location (head vs. tail of pancreas) and matched 2:1 by age, sex, and race. Outcomes included rates of pancreatic resection (pancreaticoduodenectomy [PD] or distal pancreatectomy), metastatic disease, and inpatient mortality. Multivariable logistic regression was used to adjust for comorbidities, socioeconomic factors, and hospital characteristics.
RESULTS: Among 3853 matched patients with head-of-pancreas tumors and 1408 with tail tumors, those with prior bariatric surgery had lower odds of undergoing PD (26.4 % vs. 31.1 %; adjusted odds ratio [aOR] 0.81; 95 % CI: 0.71-0.93), higher likelihood of presenting with metastatic disease (aOR 1.70; 95 % CI: 1.33-2.18), reduced inpatient mortality (1.5 % vs. 3.1 %; aOR 0.36; 95 % CI: 0.20-0.63), fewer metabolic comorbidities, and shorter lengths of stay. In patients with tail tumors, similar trends were observed, though distal pancreatectomy rates were not significantly different after adjustment.
CONCLUSION: Patients with prior bariatric surgery often present with more advanced pancreatic head tumors which may reflect diagnostic challenges from altered anatomy, likely leading to higher metastatic rates. Despite this, they have lower inpatient mortality and better metabolic profiles. Early referral and specialized diagnostic techniques can improve staging and outcomes. As bariatric surgery is more often encountered, standardized clinical guidelines are needed.
METHODS: We used the National Inpatient Sample (2016-2022), to identify adult patients hospitalized with a primary diagnosis of pancreatic cancer and a history of either bariatric surgery or class III obesity. Patients were stratified by tumor location (head vs. tail of pancreas) and matched 2:1 by age, sex, and race. Outcomes included rates of pancreatic resection (pancreaticoduodenectomy [PD] or distal pancreatectomy), metastatic disease, and inpatient mortality. Multivariable logistic regression was used to adjust for comorbidities, socioeconomic factors, and hospital characteristics.
RESULTS: Among 3853 matched patients with head-of-pancreas tumors and 1408 with tail tumors, those with prior bariatric surgery had lower odds of undergoing PD (26.4 % vs. 31.1 %; adjusted odds ratio [aOR] 0.81; 95 % CI: 0.71-0.93), higher likelihood of presenting with metastatic disease (aOR 1.70; 95 % CI: 1.33-2.18), reduced inpatient mortality (1.5 % vs. 3.1 %; aOR 0.36; 95 % CI: 0.20-0.63), fewer metabolic comorbidities, and shorter lengths of stay. In patients with tail tumors, similar trends were observed, though distal pancreatectomy rates were not significantly different after adjustment.
CONCLUSION: Patients with prior bariatric surgery often present with more advanced pancreatic head tumors which may reflect diagnostic challenges from altered anatomy, likely leading to higher metastatic rates. Despite this, they have lower inpatient mortality and better metabolic profiles. Early referral and specialized diagnostic techniques can improve staging and outcomes. As bariatric surgery is more often encountered, standardized clinical guidelines are needed.