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Summary
Meckel
Area of Science:
- Medical Genetics
- Developmental Biology
- Pathology
Background:
- Meckel syndrome is a rare autosomal recessive developmental disorder.
- Characterized by a triad of occipital encephalocele, cystic kidneys, and postaxial polydactyly.
- Prenatal diagnosis often relies on ultrasound and elevated maternal serum alpha-fetoprotein (AFP).
Purpose of the Study:
- To detail the prenatal morphological characteristics of Meckel syndrome.
- To investigate the specific patterns of neural tube defects in affected fetuses.
- To correlate histological findings with gestational age.
Main Methods:
- Histological examination of five fetuses diagnosed with Meckel syndrome.
- Analysis of kidney morphology according to Potter's classification.
- Detailed examination of neural tube defects, specifically occipital encephaloceles.
Main Results:
- All fetuses exhibited enlarged, polycystic kidneys consistent with Potter type III.
- Hepatic bile duct proliferation and pancreatic duct dilatation were observed.
- A consistent finding of double occipital encephalocele, one apical and one basal, was noted.
Conclusions:
- Double occipital encephalocele is a constant, specific indicator of Meckel syndrome.
- Prenatal morphological analysis reveals consistent kidney and neural tube abnormalities.
- These findings aid in understanding the pathogenesis of neural tube closure defects in Meckel syndrome.