Clinical features and outcomes of IgG4-related idiopathic orbital inflammatory disease: from a large southern China-based cohort.

PURPOSE

To investigate the clinical features and treatment outcomes of IgG4-related ophthalmic disease (IgG4-ROD) among idiopathic orbital inflammatory disease (IOID) patients.

METHODS

The medical records of 165 biopsy-proven IOID patients were retrospectively reviewed. Biopsy specimens were immunostained to detect IgG4 and IgG, and data regarding the clinicopathologic features, treatment outcomes, and recurrence were analyzed.

RESULTS

Among the 165 IOID patients enrolled, 100 (60.6%) were histopathologically IgG4-positive. The IgG4-positive patients had a lower rate of painful swelling or mass (17.0% versus 33.8%, p = 0.013), a longer symptom duration (p = 0.070), and a lower proportion of eyelid hyperemia (39.0% versus 58.5%, p = 0.014) than the IgG4-negative patients. Increased Ki-67 expression (15.02 ± 6.86%, p < 0.001) was observed in the IgG4-positive patients with characteristic pathological manifestations (more lymphocyte infiltration, nodular plasma cell infiltration, and follicular hyperplasia). IgG4-positive group had a higher recurrence rate in the subgroup of patients treated with surgery plus oral glucocorticoids (p = 0.046), and combined radiotherapy group has a higher cumulative proportion with recurrence (p = 0.011).

CONCLUSION

Over 60% of biopsy-proven IOID were classified as IgG4-ROD with a stronger proliferation potential. Additional radiotherapy after surgical debulking with oral corticosteroids still has a higher relapse rate, and more effective treatments are needed to prevent recurrence.