Introduction: Monochorial twin pregnancies are characterised by the presence of vascular connections between the twins. These connections can be the cause of pathologies such as the twin-twin transfusion syndrome or the TRAP syndrome, which is defined as the association of a headless, acardiac twin with a healthy twin.
Case Report: The case of an acardiac, headless twin diagnosed during pregnancy at 24 weeks of amenorrhea is described.
Discussion: An acardiac headless twin is a rare phenomenon. Yet early diagnosis is crucial during pregnancy to provide adequate monitoring. It is associated with a high death rate in the healthy twin caused by anaemia and heart failure. Therapeutic resources involve interruption of vascular anostomoses between the twins in order to perform a selective feticide.
Conclusion: Treatment of acardiac headless twin pregnancy ranges from obstetric abstentionism to interventionism, which depends on the prognosis for the healthy twin, dominated by the risk of preterm birth and heart failure.
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http://dx.doi.org/10.1016/j.arcped.2009.11.004 | DOI Listing |
Curr Biol
November 2021
Section of Neurobiology, Division of Biological Sciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA. Electronic address:
Behavioral responses of freshwater planarians have been studied for over a century. In recent decades, behavior has been used as a readout to study planarian development and regeneration, wound healing, molecular evolution, neurotoxicology, and learning and memory.The planarian nervous system is among the simplest of the bilaterally symmetric animals, with an anterior brain attached to two ventral nerve cords interconnected by multiple commissures.
View Article and Find Full Text PDFArch Pediatr
March 2010
Service de gynécologie-obstétrique C, CHU Ibn Rochd de Casablanca, Casablanca, Maroc.
Introduction: Monochorial twin pregnancies are characterised by the presence of vascular connections between the twins. These connections can be the cause of pathologies such as the twin-twin transfusion syndrome or the TRAP syndrome, which is defined as the association of a headless, acardiac twin with a healthy twin.
Case Report: The case of an acardiac, headless twin diagnosed during pregnancy at 24 weeks of amenorrhea is described.
J Gynecol Obstet Biol Reprod (Paris)
May 2007
Service de Gynécologie-Obstétrique, Centre Hospitalier Général, Lons-le-Saunier, France.
Introduction: Monochorial twin pregnancies are characterized by the presence of vascular connections between the twins. These connections can be at the origin of pathologies such as the transfused/transfuser syndrome or the TRAP syndrome which is defined as the association of a headless, acardiac twin with a healthy twin, which is the subject we will study and then review the literature.
The Clinical Case: The case of an acardiac, headless twin which was not diagnosed during pregnancy and was discovered at birth.
Development
February 2002
Division of Genetics, Department of Molecular Biology, Umeå University, S-90187 Umeå, Sweden.
The two Pax6 gene homologs eyeless and twin of eyeless play decisive early roles in Drosophila eye development. Strong mutants of twin of eyeless or of eyeless are headless, which suggests that they are required for the development of all structures derived from eye-antennal discs. The activity of these genes is crucial at the very beginning of eye-antennal development in the primordia of eye-antennal discs when eyeless is first activated by the twin of eyeless gene product.
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