Diseases

Fetus-in-Fetu

Rare abnormality where a fetal part of an identical twin that stopped developing during gestation is found within a normally developing fetus. It is considered a TWIN PREGNANCY complication.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

Rare abnormality where a fetal part of an identical twin that stopped developing during gestation is found within a normally developing fetus. It is considered a TWIN PREGNANCY complication.

MeSH Record

Classification

Broader headings

Related Concepts

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MeSH Record

Synonyms

3 entry terms
  • Fetus in Fetu
  • Parasitic Twin
  • Parasitic Twins

MeSH Record

Aspects Covered

32 allowable subheadings

Indexed with the subheadings blood, cerebrospinal fluid, classification, diagnosis, diagnostic imaging, diet therapy, drug therapy, economics, embryology, enzymology, epidemiology, ethnology, etiology, genetics, history, immunology, metabolism, microbiology, mortality, nursing, parasitology, pathology, physiopathology, prevention & control, psychology, radiotherapy, rehabilitation, surgery, therapy, urine, veterinary, virology.

MeSH Record

History Note

2025

MeSH Record

Previous Indexing

  • Fetus (1963-2024)

MeSH Hierarchy

Tree Number

  1. C16w.131w.085w.806w.500w

AMA Style

References

  1. National Library of Medicine. Fetus-in-Fetu. Medical Subject Headings (MeSH). 2026. Unique ID D000098987. http://id.nlm.nih.gov/mesh/2026/D000098987
  2. Fetus-in-Fetu. In: Wikipedia. https://en.wikipedia.org/wiki/Fetus_in_fetu
  3. Fetus-in-Fetu. In: Wikidata. https://www.wikidata.org/wiki/Q1435125