Battle's sign, also known as mastoid ecchymosis or Postauricular ecchymosis, is a late indication of fracture of middle cranial fossa of the skull, appearing as bruising over one or both of the mastoid processes at least one day after the injury. Such fractures can be associated with underlying brain trauma, as they appear as a result of extravasation of blood along the path of the posterior auricular artery.
Battle's sign, also known as mastoid ecchymosis or Postauricular ecchymosis, is a late indication of fracture of middle cranial fossa of the skull, appearing as bruising over one or both of the mastoid processes at least one day after the injury. Such fractures can be associated with underlying brain trauma, as they appear as a result of extravasation of blood along the path of the posterior auricular artery.
Source: Wikipedia "Battle's sign" · CC BY-SA 4.0
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