<prompt> Regarding Hangmans fracture true isHigh post admission moalityMost common axis fractureSurgical treatment is necessaryUnion almost always occurs  <response>: D i.e. Union almost always occurs Hangmans Fracture It occurs when a fracture line passes through the neural arch of the axis C2 veebraeQ or rarely into veebral body It is sometimes known as the injury between cervico - cranium and the rest of cervical spine. Because of its association with judicial execution it is also known as hangmans fracture,. The mechanism of injury in true, judicial hangmans fracture is extension with distraction; where as in civilian injuries motor vehicle accidents C2 fractures are caused by hyper extension, axial comression and flexion now more common and relatively have low incidence of neurological involvement than true type. Hangmans fracture 38 are 2nd most common type of axis C-2 fracture, only proceeded by odontoid fractures 41 in incidence. It is 2nd only to occipito atlantal dislocations in cervical injuries leading to fatalities. Although fractures of axis accounts for 25 - 71 of deaths at the scene of injury, acute post admission moality is thought to be as low as 2 - 3. Because of the high ratio of spinal canal size to spinal cord size at this level, neurological damage associated with hangmans fracture should be unusual 3- 10. It is not necessary to treat this injury surgically as union always occursQ even in the displaced flexed position. 