Ozge Ozberk Onur , Hasan Demir , and ? zlem Guneysel . Asymptomatic pneumocephalus after head trauma : case repor .BMJ Case Rep , 2009 , 2009 : bcr10.2008.1028 .Satapathy GC , Dash HH . Tension pneumocephalus after neurosurgery in the supine position . ......