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Fetus in fetu

V Sequira1, P Rao, K Moorthy

  • 1Department of Gastrointestinal Surgery, Seth G S Medical College, Mumbai.

Indian Journal of Gastroenterology : Official Journal of the Indian Society of Gastroenterology
|May 1, 1998
PubMed
Summary

Fetus in fetu is a rare congenital anomaly where one twin develops inside the other. This case report details a 16-year-old boy with an anencephalic fetus found within a retroperitoneal mass.

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Area of Science:

  • Embryology
  • Developmental Biology
  • Teratology

Background:

  • Fetus in fetu is a rare congenital anomaly resulting from aberrant monozygotic twinning.
  • It involves the development of one twin within the body of the other, often presenting as a mass.

Observation:

  • A 16-year-old male presented with symptoms of abdominal pain and a palpable mass.
  • Diagnostic imaging and subsequent laparotomy were performed to investigate the abdominal mass.

Findings:

  • Surgical exploration revealed an anencephalic fetus within an encapsulated retroperitoneal mass.
  • Pathological examination confirmed the presence of skeletal structures, including ribs and a primitive vertebral column with bone marrow, but no further organogenesis.

Implications:

  • This case highlights the diverse presentations of fetus in fetu, even in older pediatric patients.
  • Understanding the embryological basis is crucial for accurate diagnosis and management of such rare teratomas.

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