spinnaker sail sign

(redirected from Spinnaker Sign)
A descriptive term for a superiorly displaced thymic shadow seen on a plain chest film of a neonate with a unilateral pneumomediastinum, which the coining authors likened to a fully-blown spinnaker sail; bilateral pneumomediastinum in the neonate has been called ‘angel wings’ sign

spinnaker sail sign

An outline of the thymus of a child by radiolucent lines. It is seen on chest x-ray examinations of children with pneumomediastinum.
See also: sign