IDIOPATHIC DIFFUSE EROSION OF THE SKULL BASE PRESENTING AS CEREBROSPINAL-FLUID RHINORRHEA

We present an unusual case of generalized erosion of the skull base. W e have not found a similar case reported in the world literature. The presenting symptom was spontaneous cerebrospinal fluid (CSF) rhinorrho ea which arose from a bony defect associated with herniation of the ri ght temporal lobe into the sphenoid sinus. We discuss the management o f such a case including imaging of the skull base and the endoscopic r epair of the bony defect.