Tubulointerstitial Nephritis and Uveitis Syndrome (TINU)

Diagnostic Criteria

Standardization of Uveitis Nomenclature Criteria 2021

Clinical Criteria
  1. Anterior uveitis with our without intermediate/posterior involvement
    1. Anterior chamber cell
    2. If vitritis, choroiditis or retinal vasculitis anterior chamber inflammation is also present
  2. Tubulointerstitial nephritis
    1. Biopsy proven -OR-
    2. Elevated urine β-2 microglobulin -AND-
    3. Abnormal urinalysis or elevated creatinine
Exclusion criteria
  • Positive Syphilis serology
  • Evidence of Sarcoidosis
    • bilateral hilar adenopathy -OR-
    • tissue biopsy with non-caseating granulomata

Prevalence in Pediatric Populations

Disease Course

  • 88% have a chronic course with frequent relapses
  • Active disease can last > 2 years
  • 50% recurrence in some studies upon cessation of steroids

Treatment

  • Topical and oral steroids is the most common treatment.(3)
    • Prednisone 2 mg/kg/day to start given BID max dose of 60 mg
    • Tapering dose depends on kidney function testing
  • Given frequent long term need for steroids consider steroid sparing agents when possible
  • The following have been used in various studies
    • methotrexate (may accumulate in the kidneys and cause toxicity)
    • mycofphenolate mofetil
    • azathioprine
    • TNFα inhibitors
      • adalimumab
      • infliximab
      • golimumab
      • tocilizumab

Resources