Young man brought to emergency department after being shot on the head.
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Metal bullet made a transverse trajectory from left to right trough the supraorbital margin of frontal bone, involving also frontal sinus and frontoethmoidal recess. Bullet's trajectory is predicted by the destruction of local bone structures and by metallic foreign bodies (bullet fragments). The bullet is located on soft tissue besides right lower portion of frontal bone. There are small bulled fragments deflected into frontal lobes causing brain injury.
Bullet fragmentation generally occurs on impact of a non-jacketed or semi-jacketed bullet to a body structure, frontal bone in this case. Besides giving some clue to the bullet characteristics, fragmentation often leads to a telltale distribution of fragments spreading along the bullet course, giving an important information about the mechanism and direction of injury.