Cerebrospinal fluid leakage into the base of the skull is a condition in which cerebrospinal fluid leaks into the base of the skull. When cerebrospinal fluid leaks into the base of the skull, it can cause compression and damage to nerve cells. If left untreated, it can cause dangerous complications. Endotracheal anesthesia is a general anesthesia method commonly used in surgery to treat cerebrospinal fluid leakage.