Abstract:
:Several de novo variants in the KIF1A gene have been reported to cause a complicated form of hereditary spastic paraplegia. Additional symptoms include cognitive impairment and varying degrees of peripheral neuropathy, epilepsy, decreased visual acuity, and ataxia. We describe four patients (ages 10-18 years), focusing on their mobility and gait characteristics. Two patients were not able to walk without assistance and showed a severe abnormal gait pattern, crouch gait. At examination, severe contractures were found.In addition to describing the different phenotypes with specific attention to gait in our cases, we reviewed known KIF1A mutations and summarized their associated phenotypes.We conclude that mobility and cognition are severely affected in children with spastic paraplegia due to de novo KIF1A mutations. Deterioration in mobility is most likely due to progressive spasticity, muscle weakness, and the secondary development of severe contractures, possibly combined with an additional progressive polyneuropathy. Close follow-up and treatment of these patients are warranted.
journal_name
Neuropediatricsjournal_title
Neuropediatricsauthors
Van Beusichem AE,Nicolai J,Verhoeven J,Speth L,Coenen M,Willemsen MA,Kamsteeg EJ,Stumpel C,Vermeulen RJdoi
10.1055/s-0039-3400988subject
Has Abstractpub_date
2020-04-01 00:00:00pages
146-153issue
2eissn
0174-304Xissn
1439-1899journal_volume
51pub_type
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