Tubulointerstitial Nephritis and Uveitis Syndrome: Characterization of Clinical Features

Purpose: To describe clinical manifestations of patients with tubulointerstitial nephritis and uveitis syndrome (TINU) with a focus on posterior segment findings.Methods: Retrospective chart review.Results: 17 patients were diagnosed with TINU. Ten (59%) were female. Average age at presentation was 19 years (range 7-49). Urine β2-microglobulin was elevated in all tested patients. Six patients (35%) had isolated anterior uveitis. Eleven (65%) had posterior segment findings. Three (18%) had multifocal choroidal lesions, seven (41%) had disc edema, four (24%) had macular edema, three (18%) had choroidal neovascular membranes, two (12%) had retinal vasculitis, one (6%) had disc neovascularization and vitreous hemorrhage, one (6%) had bilateral posterior scleritis. Eleven (65%) required systemic steroid therapy, seven (41%) required immunomodulatory therapy.Conclusions: TINU occurs in all age groups. Posterior segment manifestations are common. Most patients required systemic steroid therapy, with a significant number requiring long-term systemic immunomodulation. Careful fundus examination is required on all patients with TINU.