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Background: The study aimed to fully understand small bowel necrosis, a rare but fatal complication after esophagectomy. Methods: Patients who underwent esophagectomy for esophageal cancer at the Fudan University Shanghai Cancer Center from January 2013 to December 2021 were retrospectively reviewed. Clinical information on the demographics, presenting features, and outcomes of the cases were collected. Results: Of the 6607 patients during the study period, 11 (0.2%) underwent reoperation due to bowel necrosis, including nine males (81.8%) and two females (18.2%). Among them, eight cases (72.7%) had hypertension and seven (63.6%) suffered from lower thoracic esophageal cancer. Eight (72.7%) and three (27.3%) patients underwent the Ivor‐Lewis and McKewon procedures, respectively. Jejunostomy was performed in nine patients (81.8%). The first signs of bowel necrosis appeared within 5 days after esophagectomy. Abdominal distension and deteriorating renal function were observed in seven patients (63.6%). There was no evidence of mesenteric vascular occlusion in any of the 11 cases, except for the hepatic portal venous gas found in seven patients on the computed tomography (CT) scan. Eight (72.7%) of the 11 patients underwent reoperation within 24 h due to the onset of the first symptoms. Eight (72.7%) had ileal necrosis, and three (27.3%) died. Conclusion: Close attention should be paid to patients with abdominal distension, renal function damage, and portal hepatic venous gas after esophagectomy. These patients may suffer from small bowel necrosis, which may result in rapid disease progression. Exploratory laparotomy and bowel resection are effective treatments for such patients. [ABSTRACT FROM AUTHOR]