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Medical Term:

lateral aperture of fourth ventricle


one of the two lateral openings of the fourth ventricle into the subarachnoid space (the lateral cerebellomedullary cistern) at the cerebellopontine angle.

Synonym(s): apertura lateralis ventriculi quartiTA, foramen lateralis ventriculi quarti, foramen of Key-Retzius, foramen of Luschka, foramen of Retzius

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.