TY - JOUR T1 - Spontaneous pneumomediastinum. JF - Journal of Accident & Emergency Medicine JO - Arch Emerg Med SP - 333 LP - 334 DO - 10.1136/emj.14.5.333 VL - 14 IS - 5 AU - M G Tytherleigh AU - A A Connolly AU - J L Handa Y1 - 1997/09/01 UR - http://emj.bmj.com/content/14/5/333.abstract N2 - Spontaneous pneumomediastinum, or Hamman's syndrome, is a rare condition which may present with the symptoms of chest pain, dyspnoea, dysphagia, or neck pain. The signs of subcutaneous emphysema and Hamman's crunch (the presence of a crepitance sound that varies with the heartbeat on auscultation of the precordium) are usually present. A case of this syndrome occurring in an elderly patient with none of the recognised risk factors is presented. ER -