Genetic causes of hydrops fetalis
L Van Maldergem1, E Jauniaux, C Fourneau
1Centre de Génétique Humaine, Institut de Morphologie Pathologique, Loverval, Belgium.
Pediatrics
|January 1, 1992
Summary
This study investigated fetal and neonatal autopsies for hydrops, finding 5.5% and 2.8% incidence respectively. Genetic factors were identified in 35%, with 21 novel causes of fetal hydrops discovered.
Area of Science:
- Medical Genetics
- Perinatal Pathology
- Developmental Biology
Background:
- Hydrops fetalis is a serious condition characterized by abnormal fluid accumulation in fetal tissues and cavities.
- Understanding the diverse etiologies of hydrops is crucial for diagnosis, management, and genetic counseling.
- Previous reviews have cataloged known genetic causes, but a comprehensive update is needed.
Purpose of the Study:
- To retrospectively investigate the incidence of hydrops in a large series of fetal and neonatal autopsies.
- To identify and characterize the genetic causes contributing to fetal hydrops.
- To update the known spectrum of genetic etiologies for fetal hydrops, including novel discoveries.
Main Methods:
- Retrospective analysis of 1790 fetal and neonatal autopsy cases performed between 1976 and 1988.
- Systematic investigation for the presence of hydrops in all autopsy reports.
- Literature review to identify and categorize reported genetic causes of fetal hydrops.
Main Results:
- Hydrops was identified in 5.5% of fetal autopsies (30 cases) and 2.8% of neonatal autopsies (35 cases).
- Genetic factors were implicated in 35% of hydrops cases.
- A comprehensive review identified 64 distinct genetic etiologies, with 21 previously unreported causes including skeletal dysplasias, inborn errors of metabolism, and chromosomal abnormalities.
Conclusions:
- Genetic factors play a significant role in the etiology of fetal hydrops.
- This study expands the known spectrum of genetic causes of fetal hydrops, highlighting the complexity and diversity of underlying conditions.
- The findings underscore the importance of genetic investigation in cases of fetal hydrops to improve diagnostic yield and inform future research.
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