Abstract
Spontaneous regression of cysts of the cavum septi pellucidi (CSP) and cavum vergae
(CV) is rare and little discussed. The authors present their case report of this phenomenon
following a severe headache in a 23-year-old woman, in whom magnetic resonance imaging
(MRI) had previously confirmed significant thinning of the left lateral cyst wall.
We consider this finding to be a possible predisposing factor to rupture and the spontaneous
regression of such cysts. In addition to the mechanism of cyst regression, the interrelated
causes of their expansion and formation will be discussed.
Keywords
cavum septum pellucidum - cavum vergae - cyst - endoscopic fenestration - spontaneous
regression