Spontaneous migration of a bullet in the cerebrum.

Herein, we report the case of a 32-year-old man who experienced spontaneous migration of a bullet within the brain following a gunshot injury. Emergent computed tomography revealed the bullet located in the posterosuperior side of mesencephalon. During follow-up after 10 days, the neurological status of the patient had worsened. Computed tomography revealed that the bullet had migrated posteriorly and lodged in the occipital lobe. Although a few studies have reported on the spontaneous migration of a bullet within the brain, the present case is unique as the patient examination changed with migration. We recommend serial imaging and surgery in cases of bullet migration in the brain.