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- Etiology: abnormal budding of gastrointestinal tract lined with GI epithelium, may communicate with enteric lumen proper
- US: cystic lesion with echogenic rim sign = enteric signature = hyperechoic inner layer of cyst representing bowel mucosa
- Tc-pertechnetate scan: may contain gastric mucosa so may be visible
- Clinical: commonest location of enteric duplication (35%)
Cases of Ileal Duplication
Transverse (above) and sagittal (below) US of the abdomen shows a cystic abdominal mass with an echogenic central rim.
