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Background: Even though there aren't enough studies on long-term outcomes, laparoscopic sleeve gastrectomy (LSG) is the most common procedure among weight loss surgeries. In this study, we aimed to evaluate the histopathological results of resected stomach specimens of patients who underwent LSG and to analyze the effect of histopathological results on weight loss success., Methods: The patients were divided into two groups according to histopathological results of the pathology specimens: abnormal (chronic active gastritis, chronic inactive gastritis, neoplasias) and normal. If the excess weight loss percentage (EWL%) values were over 70% at the end of the first year following LSG, the patients were considered successful in terms of weight loss. The groups were compared in terms of age, gender, preoperative body mass index (BMI) value, as well as postoperative first-year BMI, EWL%, total weight loss percentage (TWL%), and successful patient percentage., Results: A total of 599 patients were included in this study. When the patients were dichotomized according to their pathology results as normal or abnormal, 101 (%83.5) of the patients with normal pathology results had EWL% greater than 70%. On the contrary, 356 (74.5%) of the patients with abnormal pathology results had EWL% greater than 70%, and this difference was statistically significant (p=0.038)., Conclusion: Patients with normal histopathologic examination results of resected gastric specimens after LSG are more successful than the patient population with abnormal histopathologic results in terms of the percentage of patients with EWL% above 70 at the end of the first postoperative year. We recommend routine histopathologic analysis of gastric specimens after LSG in severely obese patients., Competing Interests: The authors have declared that no competing interests exist., (Copyright © 2024, Demirpolat et al.)