739 Pancreatic Cancer and Bariatric Surgery: Narrative Review
Abstract Background Pancreatic ductal adenocarcinoma (PDAC) is one of the deadliest types of cancer with an estimated incidence of 8 per 100,000 person-years and mortality of 7 per 100,000 person-years worldwide. Method A narrative review of the literature was conducted. PubMed, Web of Science and Cochrane database were searched for all published papers in Pancreatic cancer post Bariatric surgery from 1990 to November 2020. Results Epidemiological evidence in the literature has shown that obesity as a risk factor for the development of PDAC is a dose dependent risk. The review found that the risk of developing pancreatic cancer in obese or overweight individuals is 1.5 times higher than individuals with a normal BMI. At the same time, evidence from literature demonstrated that weight reduction by dietary restriction, physical activities, pharmacotherapy or weight reduction surgery reduces risk of PDAC.A total of 24 cases of pancreatic cancer were identified in the literature reported post Bariatric Surgery. The average age at diagnosis was 57.2 years and onset from surgery to diagnosis ranged from 2 months to 25 years. Of the identified cases, 23 cases were post Roux-en-Y Gastric Bypass and one case post Duodenal Switch. The review found that PDAC was the commonest reported pancreatic cancer post bariatric surgery accounting for 85.3%, followed by Neuroendocrine Tumours (NET) 16.7%. Given the variation in onset of diagnosis, bariatric surgery did not increase cancer risk but rather accelerated the diagnosis of pancreatic cancer. Conclusions Along with weight reduction and improving comorbidities, Bariatric surgery reduces risk of obesity-related carcinogenesis.