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The entrapped twin: a case of fetus-in-fetu
  1. Rashide Yaacob,
  2. Annisa Zainal Mokhtar,
  3. Dyg Zahratul Hamrak Abang Jamari,
  4. Norliana Jaafar
  1. Department of General Surgery, Sultan Abdul Halim Hospital, Sungai Petani, Malaysia
  1. Correspondence to Dr Rashide Yaacob, edie14770{at}


Fetus-in-fetu (FIF) is a rare entity in which malformed parasitic twin grows inside the body of its twin. It is most commonly presented with mass in the abdomen. We present a case of a 15-year-old boy who presented with abdominal mass since infancy. Radiological investigations are suggestive of FIF. Intraoperatively, malformed fetus in a sac was found and excised. Postoperatively the patient recovers well and was put on follow-up.

  • general surgery
  • gastrointestinal surgery

This is an Open Access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See:

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  • Contributors RY: gave the idea for the article; guarantor. AZM, DZHAJ and NJ: performed literature review. All authors: wrote the article and identified and managed the case.

  • Competing interests None declared.

  • Patient consent Guardian consent obtained.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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