Abstract
The effects of ethambutol (EMB) on vision are particularly difficult to detect in children less than 5 years of age because of a lack of complaints and objective clinical signs. The aim of this study was to assess the frequency of visual abnormalities and the utility of visual-evoked potentials (VEPs) recordings in monitoring the visual function of children less than 5 years of age who were exposed to EMB during anti-mycobacterial treatment. We performed a retrospective study in Robert-Debré University Hospital, Paris, France, including all children less than 5 years of age, who were treated with EMB for a mycobacterial infection from January 2002 to December 2012. Fourteen patients were enrolled, including 12 treated for Mycobacterium tuberculosis infection. The sex ratio was 1:1. The median age was 1.65 years (0.3 to 4.7). Five patients had subarachnoid involvement. The median EMB dose was 22 mg/kg/day (15 to 27). Only 11 patients were monitored using VEPs. Three children (27.3%) developed a visual impairment secondary to EMB, with delays of 4, 7 and 36 weeks. One of the 3 patients developed an impairment of the retrochiasmatic visual pathways, and 2 other patients developed classical retrobulbar optic neuritis. In all cases,...Continue Reading
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