Tuesday, April 16, 2013

A Rich Focus

The grey arrow is pointing to a Rich focus that has hemorrhaged into the subarachoid space
A Rich focus is a tuberculoma in the cerebral cortex. Rich foci become particularly significant when they rupture into the subarachnoid space and cause tuberculous meningitis. This entity is named for Johns Hopkins pathologist Dr. Arnold Rice Rich (1893-1968), who first described it.

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