Unilateral right-sided internal jugular phlebectasia in asthmatic children.

The most common cause of a neck mass that increases in size on straining is laryngocele. Internal jugular phlebectasia, which is of unknown cause, may present similarly. We present three cases of internal jugular phlebectasia, all of whom were asthmatic children. This association of asthma and internal jugular phlebectasia has not been reported previously.