Novel Association of the Presenilin-1 (Leu282Arg) Mutation with Isolated Spastic Paraparesis: Case Presentation and Review of Current Evidence. - De la Sen-Domínguez, María; Delgado-Alvarado, Manuel; Torres-Barquin, Marta; Quirce, Remedios; Riancho, Javier (Journal of Clinical Medicine, 2025)