Rich focus

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A Rich focus is a tuberculous granuloma occurring on the cortex of the brain that ruptures into the subarachnoid space, causing tuberculous meningitis.[1]

It is named for Arnold Rice Rich who first described it.


  1. ^ Donald PR, Schaaf HS, Schoeman JF (April 2005). "Tuberculous meningitis and miliary tuberculosis: the Rich focus revisited". J. Infect. 50 (3): 193–5. doi:10.1016/j.jinf.2004.02.010. PMID 15780412.