Co-existing ligneous conjunctivitis and IgG4-related disease.

Herein, we elucidate that ligneous conjunctivitis (LC) was proved as an IgG4-related disease (IgG4-RD) by a series of pathologic studies from primary and recurrent episodes of an LC patient. LC was diagnosed based on clinical presentation and pathological appearance; furthermore, combined with serological examination and immunohistochemical study, the case also conformed to the diagnosis of IgG4-RD. The IgG4-RD, broadly discussed in recent times, is an idiopathic disease entity with tissue fibrosis possibly involving multiple organs. To the best of our knowledge, IgG4-RD has never been reported with LC. By reporting the clinical course and literature review, we should pay attention to the association between these two diseases.