An immunocompetent, 25-year-old gentleman with bilateral chronic uveitis presented to various uveitis clinics at different points of time with documented typical clinical features of Toxoplasma Chorioretinitis (Headlight in fog appearance), Behcet's Disease (Hypopyon with peripheral retinal vasculitis), and Presumed Ocular Tuberculosis (Granulomatous Intermediate Uveitis with positive Interferon-gamma release assay) and had been treated with anti-toxoplasma drugs, oral prednisolone, and immunomodulation with oral Mycophenolate/oral Azathioprine to no avail. After cytological examination of vitreous aspirate, he was found to have non-Langerhans cell Histiocytosis which responded to chemotherapy with Vinblastine and Cyclophosphamide.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7690470PMC
http://dx.doi.org/10.4103/ijo.IJO_565_20DOI Listing

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