Spastic Paraplegia 54, Autosomal Recessive, also known as hereditary spastic paraplegia 54, is related to spasticity and spastic paraplegia 20, autosomal recessive. An important gene associated with Spastic Paraplegia 54, Autosomal Recessive is DDHD2 (DDHD Domain Containing 2), and among its related pathways/superpathways are Metabolism and Metabolic disorders of biological oxidation enzymes. Affiliated tissues include brain and spinal cord, and related phenotypes are intellectual disability and global developmental delay