Abstract
Hydroxychloroquine (HCQ) has a low risk of retinal toxicity which increases dramatically with a cumulative dose of >1000 g. Here we report a case of HCQ macular toxicity presentation in a young patient with a cumulative dose of 438 g. A 15-year-old female started attending annual consultations for retinal toxicity screening in our clinic after 3 years of HCQ treatment for juvenile idiopathic dermatomyositis. She had been diagnosed at age 12 and had been on hydroxychloroquine 200 mg/day, cyclosporin 150 mg/day and vitamin D3 since. Screening consultations included: complete ophthalmologic examination, automated perimetry (AP, M Standard, Octopus 101, Haag-Streit), multifocal electroretinogram (VERIS 6.06™, FMSIII), optical coherence tomography (OCT, fast macular protocol, Cirrus SD-OCT, Carl Zeiss), fundus autofluorescence imaging (Spectralis OCT, Heidelberg Engineering Inc.) and color testing (Farnsworth-Panel-D-15). After 5 years of treatment, AP demonstrated reduced sensibility in only one extra-foveal point in each eye (p < 0.2). Even though other exams showed no alteration and the cumulative dose was only around 353 g, consultations were increased to every 6 months. After 2-year follow-up, that is, 7 years of HCQ, a bilater...Continue Reading
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