Head CT > Infection > Epidural Abscess

Epidural Abscess

On CT, an epidural abscess appears as a focal low-density epidural mass. Dural enhancement may be present as well. The mass may extend into the subgaleal space. It also may cross the midline but usually does not cross suture lines.

In the left image notice the rim enhancing epdural fluid collection (arrowheads). In the
right image, notice the opacification of the left frontal sinus due to acute sinusitis (arrow).

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