Actinomycotic granuloma of the Gasserian ganglion with primary site in a dental root. Case report.

An unusual case of cerebral actinomycosis of the Gasserian ganglion is reported. The location and the pathological diagnosis of granuloma are both extremely rare. The literature is briefly reviewed with special reference to similar reports. The manner of spread and the course of the disease are described. The present case tends to confirm the opinion that primary cerebral actinomycosis is extremely rare and probably does not exist. The case also definitely indicates that the organism reaches the central nervous system by way of nerve or perineural pathways.