X-Linked Complicated Spastic Paraplegia Type 1 Watchlist (log in to enable) Retrieved 2021-01-23 Source Orphanet Trials — Genes L1CAM, PLP1, PTHLH, PRDX5, PDXP, ENOPH1, CALM1, CALM2, CALM3, CANX, KRIT1, F7, F8, RNF6, CAMKMT, ASRGL1 Drugs — Interested in hearing about new therapies? Registered! A congenital, X-linked, clinical subtype of L1 syndrome, characterized by spastic paraplegia, mild to moderate intellectual disability and normal brain morphology. This subtype represents the milder end of the L1 syndrome spectrum.