Resluts All the 14 cases showed clivus projecting intracranial.posterior displacement of Odontoid Process were found in 3 cases,with 1 case of Atlanto-occipita fusion malformation.
For relationship of projecting part of forehead to sex and age, most of male H. armiger(72%) has projecting p art of forehead, but some of female (21.1%) has it too .