Abstract
A 33-year-old Asian man presented with redness, swelling, and blurring of vision in both eyes for 1 month associated with headache and pain. The patient had a history of allergic rhinitis with a progressive hearing loss for 3 months, followed by bell's palsy. Given his elevated serum cytoplasmic anti-neutrophil cytoplasmic antibody (C-ANCA) and erythrocyte sedimentation rate (ESR) levels as well as computed tomography head, orbit, and peripheral nervous system that showed marked bilateral mastoiditis with opacification of the right middle ear canal and enlargement of the bilateral lacrimal gland, the suspicion of small vessel vasculitis with ocular and ear involvement was high. Because there was no significant lung or kidney involvement, a conjunctival biopsy was attempted, which revealed small capillaries surrounded by eosinophils and plasma cells. Because there are no validated diagnostic tests for eosinophilic granulomatosis with polyangiitis (EGPA), a conjunctival biopsy can be valuable and minimally invasive in the early diagnosis and treatment of small vessel vasculitis.
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