Fractures involving the frontal sinus and the ethmoid cells occasionally allow the escape of air into the cranial cavity. According to Rawling,1 a few cases have been discovered by roentgen examination in which a pocket of air has become locked intracranially, usually between the dura and the frontal lobe. In the case now reported, however, there was sufficient air to fill the lateral ventricles and the traumatic porencephalic cysts in both frontal lobes.
REPORT OF A CASE
—P. H. G., a man aged 47, incurred a fracture of the skull on July 30, 1939, when the truck in which he was riding collided with another vehicle. Before the accident, he had been employed at clerical work; he was apparently in good health, including freedom from any visual difficulties. He was unconscious after the injury, but recovered consciousness during the night. On the following morning Dr. Paul Gallagher performed
Stuck RM, Weatherby FE. PNEUMOCEPHALUS. Arch NeurPsych. 1940;44(5):1093-1097. doi:10.1001/archneurpsyc.1940.02280110167013