A 29-year-old man presented to the hospital with complaints of abdominal pain and vomiting. Abdominal computed tomography revealed intestinal malrotation, a whirl sign of the small intestine, and occlusion of the superior mesenteric artery and vein. Due to dilation of the small intestine and poor contrast enhancement of the intestinal wall, he was diagnosed with strangulating small bowel obstruction with intestinal necrosis. Emergency surgery was performed owing to the diagnosis of small bowel volvulus with intestinal malrotation, which necessitated massive small bowel resection. The remnant small intestine was approximately 100cm in length. The patient developed short bowel syndrome postoperatively but eventually resumed a normal diet.