Case Report: Case report. Anastomositis on the 1st day after OAGB.

<ns3:p>Obesity remains a global health problem, and bariatric surgery is considered the most effective treatment for morbid obesity. However, postoperative complications such as anastomotic stenosis or inflammation of the anastomosis can occur. This report describes a case of early anastomositis on the first postoperative day after a one-anastomosis gastric bypass in a 38-year-old patient with morbid obesity and metabolic comorbidities. Conservative management, including hormonal, antibacterial, and supportive therapy, led to resolution of symptoms without the need for endoscopic balloon dilation or revision surgery. Follow-up showed complete recovery with no dysphagia or reflux, and weight loss was achieved by the third postoperative month. This case demonstrates the potential effectiveness of non-surgical therapy in managing early postoperative anastomositis.</ns3:p>