Tela choroidea

The tela choroidea is the thin, highly vascularized, loose connective tissue portion of pia mater that gives rise to the choroid plexus. Thus, it is basically the lamina propria of the ependyma and lies directly adherent to it, without any tissue in between the two .

Gross anatomy

Being part of the ependyma giving rise to the choroid plexus, the tela choroidea is found in the ventricular system.

Lateral ventricles

The tela choroidea lies along the choroidal fissure in the medial wall of the lateral ventricles where it is vascularized by one anterior choroidal artery (coming off of the internal carotid artery) and several choroidal branches of the posterior cerebral artery (the medial and lateral posterior choroidal arteries) .

Third ventricle

Found in the roof of the third ventricle, the tela choroidea is supplied by the medial posterior choroidal arteries and, when present, by a superior posterior choroidal artery .

Fourth ventricle

Located in the roof of the fourth ventricle, the tela choroidea is supplied by the inferior cerebellar arteries in this location .

Related pathology

Potential issues associated with the tela choroidea or its disturbance on imaging include arachnoid cysts , meningiomas , and ependymomas .

Siehe auch:

• Plexus choroideus
• Fissura choroidea