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- Title
KIF1A‐related disorders in children: A wide spectrum of central and peripheral nervous system involvement.
- Authors
Nemani, Tarishi; Steel, Dora; Kaliakatsos, Marios; DeVile, Catherine; Ververi, Athina; Scott, Richard; Getov, Spas; Sudhakar, Sniya; Male, Alison; Mankad, Kshitij; Muntoni, Francesco; Reilly, Mary M; Kurian, Manju A; Carr, Lucinda; Munot, Pinki
- Abstract
KIF1A‐related disorders (KRD) were first described in 2011 and the phenotypic spectrum has subsequently expanded to encompass a range of central and peripheral nervous system involvement. Here we present a case series demonstrating the range of clinical, neurophysiological, and radiological features which may occur in childhood‐onset KRD. We report on all the children and young people seen at a single large tertiary centre. Data were collected through a retrospective case‐notes review. Twelve individuals from 10 families were identified. Eight different mutations were present, including four novel mutations. Two patients displayed a very severe phenotype including congenital contractures, severe spasticity and/or dystonia, dysautonomia, severe sensorimotor polyneuropathy and optic atrophy, significant white matter changes on brain MRI, respiratory insufficiency, and complete lack of neurodevelopmental progress. The remaining 10 patients represented a spectrum of severity with common features including a movement disorder with spasticity and/or dystonia, subtle features of dysautonomia, sensory axonal neuropathy, varying degrees of optic atrophy and of learning and/or behavioural difficulties, and subtle or absent—but sometimes progressive—changes in white matter on MRI. Epilepsy was common among the more severely affected children. This case series demonstrates that KRD comprise a range of neurological disorders, with both the milder and the more severe forms combining central and peripheral (including autonomic) nervous system deficits.
- Subjects
GENETICS of epilepsy; AUTONOMIC nervous system diseases; CENTRAL nervous system diseases; CONTRACTURE (Pathology); DYSTONIA; MAGNETIC resonance imaging; MEDICAL records; GENETIC mutation; NERVE tissue proteins; PERIPHERAL neuropathy; POLYNEUROPATHIES; SPASTICITY; PHENOTYPES; RETROSPECTIVE studies; SEVERITY of illness index; ACQUISITION of data methodology; WHITE matter (Nerve tissue)
- Publication
Journal of the Peripheral Nervous System, 2020, Vol 25, Issue 2, p117
- ISSN
1085-9489
- Publication type
Article
- DOI
10.1111/jns.12368