31-M/2.1 I   Incomplete midcervical

This injury is an incomplete midcervical fracture, which does not break the contralateral cortex. Due to the very strong cortex, the typical torus and buckle fractures seen in other metaphyseal areas are very rare in this region.

This fracture usually occurs on the superior aspect of the neck and is typically a low-energy injury. In children, this zone has a very thick periosteum (1-2 mm), and this injury rarely results in avascular necrosis (AVN).