Annals of African Medicine
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CASE REPORT
Year : 2016  |  Volume : 15  |  Issue : 2  |  Page : 87-90

Spinocerebellar ataxia type-7: Report of a family in Northwest Nigeria


1 Department of Medicine, ATBU Teaching Hospital, PMB 0117 Bauchi, Nigeia
2 Department of Medicine, National Hospital, PMB 425 Garki, Abuja, Nigeria

Correspondence Address:
Nura Hamidu Alkali
Department of Medicine, ATBU Teaching Hospital, PMB 0117 Bauchi
Nigeia
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/1596-3519.176205

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Spinocerebellar ataxia type-7 (SCA7) is a cytosine-adenine-guanine (CAG) repeat polyglutamine disorder characterized by progressive degeneration of the cerebellum, brainstem, spinal cord, and retina. Clinical features include progressive ataxia, visual loss, pyramidal weakness, sensory impairment, and dementia. Among the autosomal dominant cerebellar ataxias, SCA7 is relatively common in Scandinavia and South Africa but rare worldwide and is not previously reported in Nigeria. In this study, we describe a family in Katsina State, Northwest Nigeria, with nine individuals across three generations affected by the SCA7 phenotype. Analysis of DNA from proband and two affected relatives revealed 39 CAG repeat expansions in one allele of ataxin-7 in each.


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