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Optic neuritis with positive HLA-B27: Characteristic phenotype in the Chinese population
Shuo Zhao1, Huanfen Zhou2, Xudong Peng3
1Department of Neuro-Ophthalmology, The Chinese People's Liberation Army General Hospital, Beijing, China; School of Medicine, Nankai University, Tianjin, China.
Purpose:
This study retrospectively reviewed the clinical features of optic neuritis (ON) with positive HLA-B27.
Method:
Clinical data were reviewed for HLA-B27-positive ON in the Chinese People's Liberation Army General Hospital from January 2009 through June 2015. The prevalence of HLA-B27 and spondyloarthropathies was analyzed. Clinical features of HLA-B27-positive ON based on serum aquaporin 4-antibody (AQP4-Ab) were compared.
Results:
A total of 22 ON patients (14 female/8 male, 38 involved eyes) with positive HLA-B27 were collected from 410 ON patients. Recurrent episodes were observed in 14/22 patients, and seven patients presented as bilateral simultaneous ON. A total of 68.4% (22/38) of involved eyes exhibited severe visual impairment (<0.1) at onset. A total of 8/22 patients were seropositive for AQP4-Ab, and clinical features did not differ based on AQP4-Ab status. Bilateral sacroiliitis was revealed in over 50% (7/13) of patients screened using pelvic computed tomography. Three patients were diagnosed with ankylosing spondylitis (AS), and one patient experienced co-occurrence of active AS and bilateral ON.
Conclusions:
HLA-B27-positive ON may presented recurrent episodes and severe visual impairment at onset. The co-occurrence of ON and AS, and the frequent presence of bilateral sacroiliitis may indicate an underlying alternation of autoimmune background in this condition.
