An unusual case of peripheral ulcerative keratitis as a presenting feature in an otherwise healthy patient with undiagnosed human immunodeficiency virus infection and low CD4 counts

一例罕见的以周围性溃疡性角膜炎为首发症状，且患者其他方面都很健康，但存在未确诊的人类免疫缺陷病毒感染和低CD4计数的情况。