Related Experiment Videos
Early complete hydatidiform moles contain inner cell mass derivatives
M V Zaragoza1, D Keep, D R Genest
1Department of Genetics, Case Western Reserve University, Cleveland, Ohio 44106, USA.
American Journal of Medical Genetics
|June 13, 1997
Summary
Early complete hydatidiform moles can contain inner cell mass derived structures, challenging previous assumptions. This finding impacts the diagnosis and understanding of molar pregnancies and associated risks.
Area of Science:
- Reproductive Biology
- Developmental Biology
- Gynecologic Pathology
Background:
- Complete hydatidiform moles are typically androgenetic and lack a fetus.
- Previous understanding suggested these moles only contain trophoblastic tissue.
Observation:
- Four cases of early complete hydatidiform moles were analyzed.
- Nonchorionic inner cell mass derived structures were identified.
Findings:
- Structures observed include nucleated red blood cells, endothelial cells, stromal macrophages, amnion, and yolk sac.
- Immunocytochemical stains confirmed the presence of amnion, yolk sac, vasculogenesis, and hematopoiesis.
- These findings demonstrate maternal genome independence for early developmental processes.
Implications:
- Maternal genome is not essential for initiating key developmental events like amniogenesis and hematopoiesis.
- The presence of "fetal structures" in complete hydatidiform moles does not rule out the diagnosis.
- This redefines diagnostic criteria and emphasizes the risk of choriocarcinoma in molar pregnancies.