Immunoglobulin G subclass 4-related disease of the lacrimal sac presenting as bilateral lacrimal sac nodules: Rare case report

Immunoglobulin G subclass 4-related (IgG4) disease is a fibro-inflammatory systemic disease. It can present in different and wide variety of clinical presentations. The ocular manifestations of IgG4 disease are diverse, but the most common presentation is lacrimal gland involvement presenting as dacryoadenitis. In this case, we are going to present a rare presentation of IgG4-related disease involving the lacrimal sac on both sides of a 55-year-old Saudi male patient.