Kufor-Rakeb Syndrome in a Guatemalan Patient With an ATP13A2 Gene Pathogenic Variant: A Case Report.

Parkinson's disease (PD) is a neurodegenerative condition characterized by progressive loss of dopaminergic neurons and by heterogeneous etiologies and clinical manifestations. Juvenile-onset forms are rare and can be caused by biallelic mutations in several genes. Kufor-Rakeb syndrome (KRS) is an autosomal-recessive form of early-onset parkinsonism caused by pathogenic variants in the ATP13A2 (PARK9) gene. This P5B-ATPase dysfunction impairs lysosomal processing, leading to the accumulation of α-synuclein. Here, we present the first documented Guatemalan case of KRS, a young woman with progressive motor and cognitive decline. Genetic testing identified a homozygous pathogenic variant in ATP13A2. This report underscores the importance of recognizing KRS in diverse populations and of using gene-based testing to guide diagnosis, counseling, and multidisciplinary supportive care.