Retinal periphlebitis associated with branch retinal vein occlusion and complicated by subfoveal hemorrhage: a case report.

Retinal periphlebitis is a subtype of retinal vasculitis affecting the retinal veins. We report a case of bilateral branch retinal vein occlusion (BRVO) associated with idiopathic retinal periphlebitis and complicated by subfoveal hemorrhage (SFH). An 18-year-old woman presented with best-corrected visual acuity of 20/20 in the right eye and 20/30 in the left eye. Examination revealed bilateral retinal vascular sheathing predominantly involving the retinal veins and bilateral BRVO. Fundus fluorescein angiography revealed localized vascular leakage in the right eye and diffuse vascular leakage in the left eye. Spectral-domain optical coherence tomography showed mild nasal thickening with subfoveal fluid in the left eye. Oral steroids were started on a tapering dosage as well as oral methotrexate. A year later, she presented with regressed vascular sheathing in both eyes with 5/200 vision and SFH in the left eye. Pars plana vitrectomy, subretinal tissue plasminogen activator, intravitreal ranibizumab, laser photocoagulation, and gas injection were performed. The SFH resolved and the visual acuity improved to 20/100. Good vision was preserved in both eyes with no active inflammation. Timely management of SFH in idiopathic retinal periphlebitis can achieve a favorable visual outcome.