Duplication cyst

Case contributed by Jane McEniery
Diagnosis certain


Vomiting, abdominal pain.

Patient Data

Age: 10 months
Gender: Male
  • nasogastric tube, tip in the stomach
  • distended loops of bowel in the central abdomen with paucity of distal gas
  • no pneumatosis intestinalis, portal venous gas or free gas
  • lung bases clear
  • no osseous abnormality

The overall appearances are most suggestive of a distal obstruction, favoring distal small bowel.


Abdominal ultrasound demonstrates:

  • small volume free fluid
  • modestly distended small bowel loops
  • intussusception with dimensions ~2cm diameter suggesting it is small bowel rather than ileocolic
  • a rounded cyst acting as a pathological lead point; there is no internal vascularity and a bowel wall signature, indicating an enteric duplication cyst

Case Discussion

At surgery, an ileoileal intussusception was reduced and a duplication cyst acting as pathological lead point was excised. The differential for this appearance includes a Meckel diverticulum. 

Case contributed by Dr Tom Hess.

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