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[The placenta and trisomies 13, 18, 21]
1Laboratoire d'Histologie Embryologie Cytogénétique, Hôpital Fernand-Widal, Paris.
Summary
Placental abnormalities like hypotrophy, hydrops, and cysts are common in trisomies 13, 18, and 21. While these findings suggest chromosomal abnormalities, definitive diagnosis requires genetic testing.
Area of Science:
- Pathology
- Genetics
- Reproductive Medicine
Context:
- Trisomies 13, 18, and 21 are significant chromosomal abnormalities with profound effects on fetal development.
- Placental pathology offers insights into fetal well-being and potential genetic conditions.
Purpose:
- To investigate the placental lesions associated with trisomies 13, 18, and 21.
- To determine if specific placental pathological patterns can suggest a trisomy diagnosis.
Summary:
- A study of 30 trisomy cases revealed common placental lesions including hypotrophy, immaturity, hydrops, trophoblastic changes, and basal lamina mineralization.
- These non-specific lesions, when occurring together, were notably frequent in trisomy cases.
- The findings suggest that certain placental pathological patterns may indicate trisomy, but chromosome analysis remains essential for diagnosis.
Impact:
- Highlights the potential role of placental examination in prenatal diagnostics.
- Aids clinicians in recognizing potential chromosomal abnormalities based on placental findings.
- Underscores the necessity of integrating placental pathology with genetic analysis for accurate diagnosis.