“…Several authors have reported surgical evidence of separate tumours within the temporal bone further supporting the possibility of multicentricity in the tympanic-jugular location (Berg, 1950;Buckingham, 1959;Samy, 1962;Rosenwasser, 1968Rosenwasser, , 1974 Retrospective analysis of the origin of tumors reported before the mid 1970's is difficult, as the lesions tended to be diagnosed after they were advanced, and as the radiologic techniques used were not sufficiently sophisticated to provide the answers to the questions asked now.…”