Tom Allert, Vera Schellerer

• Abstract Internal hernias are defined as protrusions of viscera through congenital or acquired aperture within the peritoneal cavity without an exit from the abdomen. The entity is broadly diversified with a wide variety of forms and severity of symptoms. A 10-day-old, full-term infant with poor feeding, bilious vomiting, and faecal retention for 3 days presented at our hospital. In the abdominal ultrasound, a whirl-pool sign was detected and laparotomy indicated. Intraoperatively, a malrotation of the small bowel with herniation of the jejunum into a mesocolic hernia was detected.