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A novel KIAA0196 mutation in a Chinese patient with spastic paraplegia 8: A case report

Limin Ma¹, Yingying Shi, Zhongcan Chen

¹Department of Neurology, People's Hospital of Zhengzhou University Department of Neurology, Henan Provincial People's Hospital, Zhengzhou, China.

|May 17, 2018

Abstract

Rationale:

We report a case of Spastic paraplegia 8 (SPG8) with a novel mutation of KIAA0196 gene.

Patients Concerns:

A 12-year-old boy presented as ankle sprained, lower limb stiffness, abnormal gait since he was 5 years old.

Diagnoses:

The next generation sequence showed a novel c.1128delG (p.L376fs) mutation in KIAA0196 gene, the electromyography showed the pyramidal tract conduction dysfunction and deep sensory conduction abnormalities of lower limbs without motor neuron damage. The diagnose was SPG8.

Interventions:

Patient was gaven Baclofen treatment (30 mg/day, orally).

Outcomes:

At one year follow up, his symptoms didn't improved.

Lessons:

We describe a novel KIAA0196 c.1128del.G (p.L376fs) mutation in a Chinese patient with SPG8. To our knowledge, it's the first frame delete mutation causing shift mutation of KIAA0196 gene, resulting in the earliest onset of SPG8 in the world. Gene sequencing is a powerful diagnostic tool to identify a causal mutation in genetically heterogeneous HSP.

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