成人にみられた原発性小腸軸捻転症の1例

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  • A CASE OF PRIMARY SMALL BOWEL VOLVULUS IN AN ADULT

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A 32-year-old man admitted for sudden onset of severe upper abdominal pain and vomiting before dinner was found to have severe tenderness of the upper abdomen with peritoneal signs. Plain X-ray of the abdomen showed multiple air-fluid levels in the dilated small intestine and abdominal computed tomography (CT) showed a “whirl sign” in the small intestine loops around the superior mesenteric artery. Emergency surgery conducted 4.5 hours after onset on a diagnosis of strangulated small bowel obstruction revealed strangulation of the small intestine caused by 360° clockwise mesenteroaxic torsion. The blood flow recovered quickly after detortion, eliminating the need for intestinal resection. Due to the absence of predisposing anatomical abnormalities, the patient was diagnosed with primary small bowel volvulus. He suffered bowel obstruction due to adhesion 2 months after the first operation and was treated conservatively for 10 days. Only 46 cases of primary small bowel volvulus, including ours, have been reported in Japan. Abdominal CT is thus useful in early diagnosis.

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