Gastric mesenchymal tumors as incidental findings during Roux-en-Y gastric bypass

Abstract Background Occurrences of mesenchymal tumors have been more recognized in recent years, and the incidental diagnosis of these lesions during bariatric surgery has been previously reported. Objective To describe the cases of incidentally diagnosed mesenchymal tumors during consecutive bariatric surgeries. Setting Private health-providing service, Brazil. Methods A retrospective population-based study, which enrolled individuals who consecutively underwent Roux-en-Y gastric bypass at a single center from January 2006 through July 2016. Results Of 1502 individuals, there were 16 cases (1.1%) of confirmed mesenchymal tumors. Of these 16 cases, 14 (87.5%) were gastrointestinal stromal tumors and 2 (12.5%) were leiomyomas. The affected individuals were significantly older (aged 46.2 ± 6.3 versus 35.4 ± 7.2 yr; P = .00031), presented a lower body mass index (38.2 ± 5.1 versus 45.3 ± 8.1 kg/m 2 ; P P = .00321). None of the individuals presented reported relapses of the mesenchymal tumors. Conclusion The possibility of incidental gastric mesenchymal tumors during bariatric surgery should not be neglected; a careful inventory of the stomach at the beginning of the procedure and resection of lesions found are mandatory. (Surg Obes Relat Dis 2017;X:XXX–XXX.) © 2017 American Society for Metabolic and Bariatric Surgery. All rights reserved.