Spastic Paraplegia 74, Autosomal Recessive, also known as hereditary spastic paraplegia 74, is related to spastic paraplegia 55, autosomal recessive and hereditary spastic paraplegia 49. An important gene associated with Spastic Paraplegia 74, Autosomal Recessive is IBA57 (Iron-Sulfur Cluster Assembly Factor IBA57). Affiliated tissues include eye, and related phenotypes are peripheral axonal neuropathy and progressive spastic paraplegia