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Published on: May 12, 2015
Neuronal ceroid lipofuscinosis 11 (CLN11) presenting with early-onset cone-rod dystrophy and learning difficulties
Gustavo Maximiano-Alves1, Renata do Amaral Moreto Caravelas2, Trajano Aguiar Pires Gonçalves1
1Department of Neuroscience and Behavioural Sciences, School of Medicine at Ribeirão Preto, University of São Paulo, Bandeirantes Av. 3900, Ribeirão Preto, São Paulo, 14040-900, Brazil.
Abstract:
Neuronal Ceroid Lipofuscinosis 11 (CLN11) is an ultra-rare subtype of adult-onset Neuronal Ceroid Lipofuscinosis. Its phenotype is variable and not fully known. A 21-year-old man was evaluated in our neurogenetic outpatient clinic for early onset complex phenotype, including learning difficulties, cerebellar ataxia, cone-rod dystrophy, epilepsy, and dystonia. The patient was submitted to neurological and neuropsychological assessment, neuro-ophthalmological tests, brain MRI, EEG and whole exome sequencing. A homozygous frameshift variant (NM_002087.4: c.768_769dup; p.Gln257Profs*27) was found. Distinct type descriptions, as in this case, increase the clinical spectrum of the disease.
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