Journal
JOURNAL OF THE NEUROLOGICAL SCIENCES
Volume 376, Issue -, Pages 198-201Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jns.2017.03.021
Keywords
Xeroderma pigmentosum group F; Ataxia; Chorea; Mini-exome; Caucasian's patient
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Funding
- patients' support group Les Enfants de La Lune
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The complementation group F of Xeroderma pigmentosum (XP-F) is rare in the Caucasian population, and usually devoid of neurological symptoms. We report two cases, both Caucasian, who exhibited progressive cerebellar ataxia, chorea, a mild subcortical frontal cognitive impairment, and in one case severe polyneuropathy. Brain MRI demonstrated cerebellar (2/2) and cortical (1/2) atrophy. Both patients had only mild sunburn sensitivity and no skin cancer. Mini-exome sequencing approach revealed in ERCC4, two heterozygous mutations, one of which was never described (c.580-584 + 1delCCAAGG, exon 3), in the first case, and an already reported homozygous mutation, in the second case. These cases emphasize that XP-F is a rare cause of recessive cerebellar ataxia and can in some cases clinically mimic Huntington's disease due to chorea and executive impairment. The association of ataxia, chorea, and sun hypersensitivity are major guidance for the diagnosis, which should not be missed, in order-to-prevent skin neoplastic complications. (C) 2017 Elsevier B.V. All rights reserved.
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