Among 1142 patients with head injuries hospitalized in the Neurosurger
y Department of Gazi University Medical School during the period betwe
en 1979 and 1992. 583 had initial CT scans. A retrospective analysis o
f these initial CT images revealed intracranial air on admission in on
ly 21 cases. These were classified as acute traumatic intracranial pne
umocephalus: a potentially serious complication of head injury. CT sca
ns were re-evaluated so as to reveal whether air was situated in the e
pidural, subdural. or subarachnoid spaces or intracerebrally; whether
associated space-occupying lesions were present; and whether the air b
ubbles were single or multiple. Clinical data such as the presence of
persistant rhinorrhea and/or otorrhea, tension pneumocephalus, severit
y and type of trauma, and outcome were also assessed to determine the
significance of this rare finding.