Abstract
To identify the characteristics and outcome of panuveitis of undetermined origin (PUO) after diagnostic vitrectomy. Retrospective analysis of all patients who underwent vitrectomy for diagnostic/therapeutic purposes from 2013 to 2020, whose vitreous biopsies turned out negative and final diagnoses were not clinically supported. Of 122 operated eyes, 36 eyes (29.5%) were defined as PUO (67.8 ± 14.9years). The presenting clinical picture revealed a predominantly bilateral condition (70% of eyes) with significant posterior segment involvement: 3.1 ± 0.6 vitritis, 61.1% of eyes with retinal vasculitis, 44.4% with macular edema, and 30.6% with exudative retinal detachment. Presenting visual acuity was 1.2 ± 0.7 logMAR, and up to 90% remained stable or improved vision over a ~ 3.5year observation period. None of the presenting clinical features turned out to be predictive of final visual outcome or survival. PUO is present in up to 30% of cases after diagnostic/therapeutic vitrectomy. This mainly bilateral condition shows chronic and overall stable long-term outcome, generally with retained steady visual function.
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