| Autor: |
Boer LL; Department of Medical Imaging, Section Anatomy and Museum for Anatomy and Pathology, Radboud University Medical Center, 6500 HB Nijmegen, The Netherlands., Winter E; Pathologisch-Anatomische Sammlung im Narrenturm-NHM, 1090 Vienna, Austria., Gorissen B; Department of Medical Imaging, Section Anatomy and Museum for Anatomy and Pathology, Radboud University Medical Center, 6500 HB Nijmegen, The Netherlands., Oostra RJ; Department of Medical Biology, Sections Clinical Anatomy & Embryology, Academic Medical Center, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands. |
| Jazyk: |
angličtina |
| Zdroj: |
Diagnostics (Basel, Switzerland) [Diagnostics (Basel)] 2023 Nov 10; Vol. 13 (22). Date of Electronic Publication: 2023 Nov 10. |
| DOI: |
10.3390/diagnostics13223427 |
| Abstrakt: |
A multitude of additional anomalies can be observed in virtually all types of symmetrical conjoined twins. These concomitant defects can be divided into different dysmorphological patterns. Some of these patterns reveal their etiological origin through their topographical location. The so-called shared anomalies are traceable to embryological adjustments and directly linked to the conjoined-twinning mechanism itself, inherently located within the boundaries of the coalescence area. In contrast, discordant patterns are anomalies present in only one of the twin members, intrinsically distant from the area of union. These dysmorphological entities are much more difficult to place in a developmental perspective, as it is presumed that conjoined twins share identical intra-uterine environments and intra-embryonic molecular and genetic footprints. However, their existence testifies that certain developmental fields and their respective developmental pathways take different routes in members of conjoined twins. This observation remains a poorly understood phenomenon. This article describes 69 cases of external discordant patterns within different types of otherwise symmetrical mono-umbilical conjoined twins and places them in a developmental perspective and a molecular framework. Gaining insights into the phenotypes and underlying (biochemical) mechanisms could potentially pave the way and generate novel etiological visions in the formation of conjoined twins itself. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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