This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Surgery
Battle's sign is 
Select and explain. 
A. Periorbital ecchymosis, B. Ecchymosis around mastoid area, C. Facial congestion and cyanosis, D. Pulsatile ear discharge
B: Ecchymosis around mastoid area
Answer: B: Ecchymosis around mastoid area 
Explanation: (B) Ecchymosis around mastoid area # Battle's sign, or mastoid ecchymosis, is an indication of fracture of posterior cranial fossa of the skull, and may suggest underlying brain trauma.> Battle's sign (named after William Henry Battle) consists of bruising over the mastoid process, as a result of extravasation of blood along the path of the posterior auricular artery.> Note well that this sign will take at least one day to appear after the initial traumatic basilar skull fracture, similar to Raccoon eyes.> It is usually seen after head injuries resulting in injury to mastoid process leading to bruising.> Battle's sign may be confused with a spreading hematoma from a fracture of the mandibular condyle (less serious injury).