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Brain ; 145(4): 1499-1506, 2022 05 24.
Artigo em Inglês | MEDLINE | ID: mdl-34664630

RESUMO

Disability in leprosy is a direct consequence of damage to the peripheral nervous system which is usually worse in patients with no skin manifestations, an underdiagnosed subtype of leprosy known as primary neural leprosy. We evaluated clinical, neurophysiological and laboratory findings of 164 patients with definite and probable primary neural leprosy diagnoses. To better understand the disease progression and to improve primary neural leprosy clinical recognition we compared the characteristics of patients with short (≤12 months) and long (>12 months) disease duration. Positive and negative symptoms mediated by small-fibres were frequent at presentation (∼95%), and symptoms tend to manifest first in the upper limbs (∼68%). There is a consistent phenotypic variability between the aforementioned groups. Deep sensory modalities were spared in patients evaluated within the first 12 months of the disease, and were only affected in patients with longer disease duration (∼12%). Deep tendon reflexes abnormalities were most frequent in patients with longer disease duration (P < 0.001), as well as motor deficits (P = 0.002). Damage to large fibres (sensory and motor) is a latter event in primary neural leprosy. Grade-2 disability and nerve thickening was also more frequent in cases with long disease duration (P < 0.001). Primary neural leprosy progresses over time and there is a marked difference in clinical phenotype between patients with short and long disease duration. Patients assessed within the first 12 months of symptom onset had a non-length-dependent predominant small-fibre sensory neuropathy, whilst patients with chronic disease presented an asymmetrical all diameter sensory-motor neuropathy and patchily decreased/absent deep tendon reflexes.


Assuntos
Hanseníase Tuberculoide , Hanseníase , Doenças do Sistema Nervoso Periférico , Humanos , Hanseníase/complicações , Hanseníase/diagnóstico , Hanseníase/patologia , Hanseníase Tuberculoide/diagnóstico , Hanseníase Tuberculoide/patologia , Doenças do Sistema Nervoso Periférico/diagnóstico
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