Cerebellar Ataxia With Neuropathy and Vestibular Areflexia Syndrome Due to Replication Factor C Subunit 1 Gene Repeat Expansion.

Tsuchiya, Mitsuteru; Bunai, Tomoyasu; Watanabe, Kazuki; Saitsu, Hirotomo; Goshima, Satoshi · Clin Nucl Med · 2024

case_report · Level V

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Abstract

A 56-year-old man was born to consanguineous parents. He experienced slow-progressing sensory disturbances in the upper extremities. T1-weighted images showed cerebellar atrophy. 123I-IMP SPECT revealed reduced cerebral blood flow in the cerebellum. 123I-FP-CIT SPECT showed low uptake of dopamine transporter in the bilateral tail of the striatum. 123I-MIBG scintigraphy shows a decreased heart-to-mediastinum ratio. Flanking polymerase chain reaction suggested biallelic repeat expansion in intron 2 of RFC1, and subsequent repeat-primed polymerase chain reaction revealed ACAGG repeat expansion. Thus, he was diagnosed as cerebellar ataxia with neuropathy and vestibular areflexia syndrome.

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