Hereditary Spastic Paraplegia 18, also known as autosomal recessive spastic paraplegia type 18, is related to lateral sclerosis and spasticity. An important gene associated with Hereditary Spastic Paraplegia 18 is ERLIN2 (ER Lipid Raft Associated 2), and among its related pathways/superpathways is Cytoskeletal Signaling. Affiliated tissues include brain, and related phenotypes are Decreased p24 protein expression and nervous system