ESS can also cause CSF leakage from ears and/or nose. I haven't seen where this condition has been mentioned while skimming through earlier posts and thought it would be worth posting. Mine was dx'd by MRI, with and without contr., but I believe they can dx with CT as well. Very rare and gets misdx'd a lot, but fortunately isn't anything serious. There's really not anything I know of to stop the leakage. It is my left ear that leaks and the fluid is clear for the most part, but with a light orange/rust tint to it (which happens to stain anything it touches, btw. :/ ). My leaks are sporadic, not daily or even weekly and they started up about 6 yrs. ago.