TY - JOUR T1 - Spontaneous pneumocephalus JF - Emergency Medicine Journal JO - Emerg Med J SP - 220 LP - 220 DO - 10.1136/emj.2008.071241 VL - 27 IS - 3 AU - J H Oh AU - H I Na Y1 - 2010/03/01 UR - http://emj.bmj.com/content/27/3/220.abstract N2 - A 31-year-old man presented to the emergency department with an acute headache developed while tying a necktie. He had … ER -