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25.0 MB (1.2 MB compressed)
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26.9 x 23.1 cm ⏐ 10.6 x 9.1 in (300dpi)
DR NAJEEB LAYYOUS / SCIENCE PHOTO LIBRARY DR NAJEEB LAYYOUS / SCIENCE PHOTO LIBRARY
Choroid plexus cyst. Ultrasound scan of a foetus' brain with a choroid plexus cyst (CPC). The choroid plexus is a layer of cells and blood vessels at the centre of the foetal brain. It produces a fluid, called cerebrospinal fluid, that flows around the brain and provides a protective cushion for it against impacts. CPCs in foetuses are temporary bubbles of trapped fluid that are usually gone by the 32nd week of pregnancy. They are classed as 'markers' for underlying chromosome abnormalities in the foetus. Ultrasound scanning is a diagnostic technique that sends high-frequency sound waves into the body via a transducer. The returning echoes are recorded and used to build an image of an internal structure.
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