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Battle sign is ecchymosis located over the mastoid process due to a basilar skull fracture impacting the petrous portion of the temporal bone


Photo credit (both images): Piotr et al., CC BY 3.0, via Our Dermatology Online


Photo credit (both images): Piotr et al., CC BY 3.0, via Our Dermatology Online
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Pathoma
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Boards and Beyond
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Sketchy
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Sketchy Extra
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Picmonic
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Pixorize
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OME
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