Choroid plexus

Last revised by Raymond Chieng on 26 Apr 2023

The choroid plexus is located within the cerebral ventricles and is made of choroidal epithelial cells (type of ependymal cell), loose connective tissue (tela choroidea), and permeable capillaries. It produces cerebrospinal fluid

The choroid plexuses also form the blood-CSF barrier alongside arachnoid and arachnoid villi 2.

Rich in blood supply and lack of blood-brain barrier lead to avid enhancement of a normal choroid plexus after contrast administration. However, the enhancement may appear asymmetrical on both sides of the brain or mass-like, leading to false interpretations of tumor 4.

On the other hand, choroid plexus can be entirely calcified and lack enhancement which can resemble other types of non-enhancing tumors such as tuberculoma, neurocysticercorsis, non-enhancing meningioma or schwannoma 4.

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Cases and figures

  • Figure 1: choroid plexus of lateral ventricles (Gray's illustration)
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  • Case 1: labeled 67
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  • Case 2: labeled 70
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  • Case 3: labeled 3
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  • Case 4: labeled 90
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