Cranial Dura Breach by Extradural Skull Base Hydatid Cyst Leading to Intraventricular Spread: A Novel Case of Intraventricular Spread.

Intraventricular hydatid cysts are extremely rare. Till date, these cysts have been believed to originate from the ventricle itself. Of the various intraventricular cysts, primary solitary cysts are the most common ones. These cysts are purely intraventricular or partly parenchymal with an intraventricular spread. These cysts have so far never been reported to spread contiguously from the extradural location, breach the dura, and thereafter, migrate intraventricularly. Here, we present a unique case of intraventricular spread of an extracerebral hydatid cyst after a dural breach. The ability of hydatid cysts to breach the dura has not been described previously. The pathogenesis of the hydatid cyst has been discussed here along with its surgical and medical management.