Hereditary Spastic Paraplegia 72a, also known as autosomal spastic paraplegia type 72, is related to spastic paraplegia 72a, autosomal dominant and amyotrophic lateral sclerosis 1. An important gene associated with Hereditary Spastic Paraplegia 72a is REEP2 (Receptor Accessory Protein 2). Related phenotypes are spastic gait and rigidity