Cases with IgG4-related ophthalmic disease with mass lesions surrounding the optic nerve

IgG4-related ophthalmic disease (IgG4-ROD) is a lymphoproliferative disorder with representative symptoms including lacrimal gland enlargement (Mikulicz disease), masses around the trigeminal nerves, and extraocular muscle swelling. Herein, we describe cases of IgG4-ROD with lesions surrounding the optic nerve.Of the 56 consecutive patients (35 men and 21 women) with a "definite case" of IgG4-ROD diagnosed from November 2004 through December 2019 at Kanazawa University hospital, seven patients presented with mass lesions around the optic nerve based on magnetic resonance imaging, and four patients showed symptoms of optic neuropathy. The clinical courses of these seven cases were reviewed.Among the 56 cases of IgG4-ROD, seven cases had lesions surrounding the optic nerve and all of these patients were male. The male dominance in the patient group with lesions surrounding the optic nerve was statistically significant based on a Chi-squared test (p < 0.001). Lacrimal gland swelling was also present in all seven cases, extraocular muscle enlargement in six cases, and trigeminal (infraorbital and supraorbital) nerve enlargement in six cases. Four patients showed deteriorated visual acuity compatible with optic neuropathy. These seven patients were treated by systemic steroid administration. Overall, in cases with optic neuropathy, visual function responded well to steroid therapy; however, recovery was limited in the worst case.Attention should be paid for mass lesions surrounding the optic nerve in patients with IgG4-related disease, especially in cases with high serum IgG4 levels.