Abnormal mri brain Subdural empyema l
Ø collection of pus between dura and leptomeninges
Øas a complication of meningitis, paranasal sinusitis, otitis media, osteomyelitis, or a penetrating wound of the skull
Ø Frontal sinusitis is the most common cause
Ø Route: retrograde fashion through a dural sinus or through bridging veins
Ø even when small, usually cause focal neurologic deficits
Ø considered a neuro-surgical emergency because of its progressive clinical course.
ØDespite recent improvement in surgical technique and antibiotics, mortality remains high (25% to 40%).
ØComplications :venous thrombosis and infarction
hypodense or isodense crescentic or lenticular area adjacent to the inner table of the skull CECT and enhancement of the medial rim may be seen
abnormal mri brain, Enhancement of the margin of the empyema is characteristic better visualized with MRI than with CT
Abnormal mri brain of the empyema