Fetus-in-fetu form of monozygotic twinning with retroperitoneal teratoma

Enid Gilbert-Barness, John M. Opitz, Diane Debich-Spicer, Thomas Mueller, Sonya R. Arnold, Reuben Quintero

Research output: Contribution to journalArticle

13 Scopus citations


One of the commonest defects of blastogenesis is monozygotic twinning resulting in separate or conjoint twins, the latter including a category of internal, "endoparasitic," or fetus-in-fetu twins. We report the third known instance of endoparasitic twinning associated with a benign teratoma at age 1. The host, twin, and teratoma were monozygotic by DNA analysis.

Original languageEnglish (US)
Pages (from-to)406-412
Number of pages7
JournalAmerican Journal of Medical Genetics
Volume120 A
Issue number3
StatePublished - Jul 30 2003


  • Blastogenesis
  • Endoparasite
  • Fetus-in-fetu
  • Monozygotic twinning
  • Prenatal diagnosis
  • Teratoma

ASJC Scopus subject areas

  • Genetics(clinical)

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    Gilbert-Barness, E., Opitz, J. M., Debich-Spicer, D., Mueller, T., Arnold, S. R., & Quintero, R. (2003). Fetus-in-fetu form of monozygotic twinning with retroperitoneal teratoma. American Journal of Medical Genetics, 120 A(3), 406-412. https://doi.org/10.1002/ajmg.a.10153