Related Experiment Video
Updated: May 16, 2026

05:51
Monitoring the Mechanical Evolution of Tissue During Neural Tube Closure of Chick Embryo
Published on: November 10, 2023
Multiple neural tube defects may not be very rare
Santosh Kumar Mahalik1, Dhananjay Vaze, Ravi Prakash Kanojia
1Department of Pediatric Surgery, PGIMER Chandigarh, Chandigarh 160012, India. dr.santosh25@gmail.com
Summary
Multiple neural tube defects (MNTDs) are rare, with only 0.038% incidence found in this study. Further research into molecular pathways could offer prevention and in utero treatment strategies for these congenital anomalies.
Area of Science:
- Developmental Biology
- Neonatalogy
- Clinical Genetics
Background:
- Multiple neural tube defects (MNTDs) are uncommon congenital anomalies.
- Their rarity poses embryological questions regarding neural tube closure.
- Understanding MNTDs is crucial for diagnosing associated central nervous system anomalies.
Observation:
- A prospective study identified 10 cases of MNTDs among 263 neural tube defect (NTD) patients.
- The incidence of MNTDs within the NTD cohort was 0.038%.
- Nine patients had double NTDs, and one had triple NTDs.
Findings:
- MNTDs may be more prevalent in populations with high NTD incidence.
- The multisite closure theory can explain various MNTD combinations.
- Further investigation into molecular pathways is needed to understand MNTD pathogenesis.
Implications:
- Insights into molecular pathways could lead to novel prevention strategies for NTDs.
- Potential for in utero pharmacological interventions to treat or prevent MNTDs.
- Enhanced understanding of MNTD pathogenesis may improve clinical management and outcomes.
Related Concept Videos
Neurulation
Neurulation is the embryological process which forms the precursors of the central nervous system and occurs after gastrulation has established the three primary cell layers of the embryo: ectoderm, mesoderm, and endoderm. In humans, the majority of this system is formed via primary neurulation, in which the central portion of the ectoderm—originally appearing as a flat sheet of cells—folds upwards and inwards, sealing off to form a hollow neural tube. As development proceeds, the anterior...
Nondisjunction
During meiosis, chromosomes occasionally separate improperly. This occurs due to failure of homologous chromosome separation during meiosis I or failed sister chromatid separation during meiosis II. In some species, notably plants, nondisjunction can result in an organism with an entire additional set of chromosomes, which is called polyploidy. In humans, nondisjunction can occur during male or female gametogenesis and the resulting gametes possess one too many or one too few chromosomes.
Teratogenicity
The ability of a drug to produce structural deformations and functional abnormalities in the developing embryo or the fetus is called teratogenicity, and the drug producing this effect is known as a teratogen. Teratogenic effects include stillbirth, miscarriage, intrauterine growth restriction, and neurocognitive delay. A teratogen may affect the embryo at different stages of development, which is important in determining the type and extent of the damage. During blastocyst formation, the early...

