The cavum Vergae is a posterior extension of the cavum septi pellucidi, an anomaly that is found in a small percentage of human brains. It was first described by Andrea Verga.

Cavum Vergae
Difference between cavum septi pellucidi (CSP), cavum Vergae (CV), and cavum veli interpositi (CVI). 3=third ventricle, 4=fourth ventricle.
Anatomical terms of neuroanatomy