Subdural empyema MRI

MRI in the optimal imaging study in the diagnosis of subdural empyema. Findings on MRI suggestive of subdural empyema are similar to those on CT scan, and include a crescent or bi-convex shaped collection. A surrounding membrane that enhances intensely and uniformly following gadolinium enhancement is typically identified and may also demonstrate restricted diffusion.^[1]

MRI with gadolinium enhancement is considered the optimal imaging study for intracranial and spinal subdural empyema. MRI clearly reveals pus collections, and potentially meningitis. The characteristic image suggestive of a subdural empyema on an MRI is a fluid collection in a crescent shape surrounded by a contrast-enhancing rim. On MRI, subdural empyema appears with a low signal on T1 and a high signal on T2 weighted images.^[2] MRI may be used in emergency situations, with high level of suspicion, for the potential diagnosis of subdural empyema at a time when symptoms include headache and fever, and there is absence of focal neurologic signs.^[3] The diffusion-weighted imaging method increases the precision of diagnosis and offers the ability to monitor antibiotic therapy.^[4] Additionally, the MRI should be evaluated for the presence of epidural abscess, meningitis, brain abscess, cerebral edema, sinusitis, otitis, and mastoiditis.^[3]

Template:WH Template:WS