Battle Sign (Mastoid echymosis)
Last updated 07/05/18
Postauricular or mastoid echymosis caused by blood extravasation from a
base of skull fracture
Extravasation of blood occurs along pathway of posterior auricular artery
Posterior auricular artery not typically the source of bleed
Blood tracks superficially along same pathway
Typically occurs 1-3 days after
Not usually present at time of injury so diagnostic use is limited
Named after British surgeon William Battle who described it in 1890
Course of posterior auricular artery
Base of skull fracture
Cherney K. Whats is a Battle Sign? HealthLine. 03/07/2017.
Holmes D. Battle Sign. Life in the Fast Lane. 20/11/2017.