Abstract: Congenital transverse mesenteric hernia is rare in clinical practice. The study reported one case of a patient who was misdiagnosed as small bowel tumor because of symptoms of abdominal distension and CT images showing a mass originated from the initial part of jejunum. However, intraoperative exploration confirmed congenital transverse mesenteric hernia. After the surgical intervention of releasing the hernia sac and repairing the mesenteric hiatus, the patient was discharged from hospital. This study aims to improve the understanding congenital transverse mesenteric hernia and reduce misdiagnosis.

Key words: hernia, ventral, mesentery, intestinal obstruction