TINU syndrome (medical condition): A rare disorder characterized by neurological degeneration and... more ». See also: Tubulointerstitial nephritis and uveitis :» Introduction: Tubulointerstitial nephritis and uveitis. » Symptoms of Tubulointerstitial nephritis and uveitis.INU syndrome is listed as a  rare disease  by the Office of Rare Diseases (ORD) of the National Institutes of Health (NIH). This means that TINU syndrome, or a subtype of TINU syndrome, affects less than 200,000 people in the US population. Source-National Institutes of Health (NIH).