Abstract
173 Background: The epidemiology of intraductal papillary mucinous neoplasms (IPMNs) of the pancreas is poorly defined. Methods: An epidemiologic questionnaire was administered to patients (pts) with IPMN (n=79), pancreatic adenocarcinoma (PC) (n=689) and healthy controls (n=307). Results were adjusted for age, gender and BMI. IPMN was defined either by surgical pathology (n=62) or characteristic endoscopic ultrasound appearance and cyst fluid CEA>200 ng/ml (n=17). Results: In unadjusted analysis IPMN pts were more likely to be ≥ 70 years of age (OR 5.40 [2.88, 10.46]) when compared with PC pts (OR 2.82) and controls. After adjustment for age, gender and BMI, current tobacco smoking was associated with PC (OR 3.06 [1.78, 5.23]) but not IPMN. Pts with IPMN more often had diabetes mellitus for >3 years compared with controls (OR 3.25 [1.45, 7.00], while pts with PC (OR 1.52 (0.86, 2.67]) did not. IPMN pts were more likely to have a history of hypercholesterolemia compared with controls (OR 1.77 [1.05-2.98]); this was not seen for PC pts (OR 1.16 [0.87-1.55]). A first degree relative with PC was not associated with increased risk for IPMN (OR 0.84 [0.27, 2.62]) or PC (OR 1.48 [0.82, 2.67]). Compared to PC, pts with IPMN were more likely to have a history of an unrelated cancer (OR 1.84 [1.08, 3.14]). Conclusions: Risk factors for IPMN and PC may differ. Compared to PC and control pts, IPMN patients were older; more often had diabetes mellitus and hypercholesterolemia; and did not currently smoke. IPMN was more often associated with a prior history of cancer than PC. No significant financial relationships to disclose.
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