<prompt> Fracture-ala signature or signature fracture is -Gutter fracture Contre copup injuryDepressed fracture of skullRing fracture at foramen magnumSutural separation  <response>: The synopsis of forensic medicine toxicology Dr k.s narayan reddy ;28th edition; pg.no. 140 . Depressed fractures produced by local deformation of skull ,caused by a heavy weapon with small striking surface. These are also called FRACTURE A LA SIGNATURE SIGNATURE FRACTURE 