Development of Choroid Plexus
- Choroid plexus development starts between 6–7 weeks post-conception (p/c).
- Initial formation occurs in the fourth ventricle.
- Later becomes most prominent in the lateral ventricles.
- Achieves adult anatomical configuration by ~20 weeks gestation.
Formation Process:
- Begins as neuroepithelial projections into ventricular cavities.
- These projections form choroidal villi.
- Small cysts/tubules can develop within these villi due to neuroepithelial tissue folding and separation.
Choroid Plexus Cysts (CPC)
Overview:
- Common fetal ultrasound finding, usually benign.
- Typically identified in the second trimester.
- Prevalence: Found in up to 1% of pregnancies.
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