Hereditary Spastic Paraplegia, also known as hereditary spastic paraparesis, is related to hereditary spastic paraplegia 35 and spastic paraplegia 2, x-linked, and has symptoms including leg cramps, pain in lower limb and urgency of micturition. An important gene associated with Hereditary Spastic Paraplegia is SPAST (Spastin). The drugs Pentoxifylline and Acetylcholine have been mentioned in the context of this disorder. Affiliated tissues include spinal cord and retina, and related phenotypes are nervous system and homeostasis/metabolism