Double gene mutations of LRSAM1 and REEP1 and a new REEP1 mutation site found in a patient with amyotrophic lateral sclerosis with subjective paresthesia: A case report

Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease characterized by selective degeneration of upper and lower motor neurons. Although dyskinesia is the most prominent clinical manifestation of ALS, with an in‐depth understanding of disease pathogenesis and clinical detection, more and more ALS patients are found to have nonmotor symptoms, such as sensory impairment. Genetic testing technology has developed rapidly in recent years. New genes have been proven to be involved in the pathogenesis of ALS. However, according to the existing research evidence, no literature has reported that patients with ALS have leucine‐rich repeats and sterility α mutations in motif 1 (LRSAM1) and receptor expression accessory protein 1 (REEP1). The mutation sites of REEP1 gene have not been reported, and the simultaneous mutations of two genes have not been reported. In the largest human gene mutation frequency database gnomad, the mutation sites of two genes are currently defined as new heterozygous variants with unclear clinical significance. Therefore, this article reports the clinical data of this case to further deepen the clinicians' understanding of the disease, and may provide evidence for further study of the new genotype–phenotype of LRSAM1 and REEP1.