What does variable density in the collection indicate
Age / stages of the hematoma, recurrence, clot retraction or findings due to decreased hematocrit level
How to differentiate between all the diagnostic possibilities?
Correlation with PCV and Hg levels, prior imaging or CECT brain. MRI can tell the age / various stages of hematoma.
Plain axial images of CT scan, plain brain show a large, well-defined extra-axial, subdural collection along right cerebral hemisphere having both blood and fluid densities within it. It is causing mass effect, contralateral midline shift and possible sub falcine brain herniation. Adjacent brain parenchyma is compressed.