SPONTANEOUS CEREBROSPINAL-FLUID FISTULA THROUGH THE CLIVUS - REPORT OF 2 CASES

THERE HAVE BEEN no previous reports of a spontaneous cerebrospinal fluid fistula through the clivus. We present two such cases, describe their management, and propose a physiopathological explanation. The pulsating effect of the basilar artery in Patient 1 and brisk increases in intracranial pressure through repeated Valsalva maneuvers, acting on a congenitally thin bone in Patient 2, seem to be the plausible causes for the clival leakage.