Charcot-Marie-Tooth (CMT) disease, the most common inherited peripheral neuropathy, has pain as one of its clinical features, yet it remains underdiagnosed and undertreated. This literature review assessed data related to pain from CMT to determine its prevalence, type and importance as a symptom, which, unlike other symptoms, is likely to be treated. The research encompassed 2007 to 2017 and included five articles that addressed pain from CMT. All of the papers concurred that pain is frequently present in CMT patients, yet its classification remains undefined as there has been no consensus in the literature about the mechanisms that cause it.Keywords: Charcot-Marie-Tooth disease; pain. RESUMOA doença de Charcot-Marie-Tooth (CMT), a neuropatia periférica hereditária mais comum, tem a dor como uma de suas características clínicas, a qual permanece subdiagnosticada e subtratada. Essa revisão de literatura avaliou os dados relacionados à dor em CMT com objetivo de observar sua prevalência, tipo e importância como sintoma que, em detrimento de outros, é possível ser tratado. O intervalo da pesquisa foi entre 2007 e 2017, através de cinco artigos abordando a dor em CMT. Todos os artigos concordam que a dor é frequente nos pacientes com a doença de CMT e a sua classificação permanece indefinida por não haver consenso na literatura sobre os mecanismos da dor.Palavras-chave: doença de Charcot-Marie-Tooth; dor.
Background: Charcot-Marie-Tooth disease type 1A (CMT1A) is the most common form of hereditary neuropathy. Objective: To investigate the prevalence and characteristics of pain in patients with CMT1A. Methods: Nineteen patients with a diagnosis of CMT1A were evaluated between September 2018 and October 2019, and other causes of neuropathy were ruled out. The following tools were used for the pain assessment: neurological assessment, LANSS, DN4, clinical evaluation, VAS, CMTNS2 and SF-36. Statistical analysis was performed using prevalence analysis, t test, chi-square test and Spearman's rho. Results: The prevalence of pain was 84.2% in the sample of this study, with moderate intensity and nociceptive characteristics according to the LANSS scale (75%) and clinical evaluation (50%), but differing from DN4, which found neuropathic pain in the majority of the patients (56.2%). Mixed pain was also observed in 43.7% of the patients, according to clinical criteria. There was a statistically significant correlation between pain intensity and SF-36, thus demonstrating that the lower the pain was, the lower the impairment was, in all domains. Conclusion: Pain is a prevalent and important symptom in CMT1A, with moderate intensity and nociceptive characteristics according to two tools, but neuropathic pain is also present, and there may even be a mixed pattern of pain. The correlation of the pain with SF-36 suggests that pain relief could provide improvements to the quality of life of these individuals.
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