Carpal tunnel syndrome observed after an arbovirus infection: A preliminary case series report

PURPOSE: Report a case series study of individuals who, after having a suspected arboviral disease during an epidemic outbreak in north-eastern Brazil, presented symptoms of acroparesthesia. METHODS: A retrospective evaluation of patients with acroparesthesia undertaken between December 2015 and October 2016 following a clinical picture suggestive of an arboviral infection. RESULTS: Clinical and electrophysiological data were obtained from 29 individuals. 13% were male. All presented a main complaint of numbness in the hands, with 86% presenting bilateral symptoms. The symptoms started within 60 days of the clinical picture in 62% of cases. The electrophysiological study demonstrated CTS in 54 median nerves. It was classified as mild in 24.1% of cases, moderate in 32.7%, severe in 24.1%, very severe in 6.8% and extremely severe in 5.1%. CONCLUSION: The best explanation for the presence of acroparesthesia following an arboviral infection may be the narrowing of the carpal tunnel caused by the inflammatory joint process usually observed in cases of chikungunya infection. CLINICAL RELEVANCE: This is the first study with electrophysiological data that associates arboviral infection with CTS.