Three hundred and thirty-four cases of salivary gland neoplasms are reported which were diagnosed by the Departments of Dentistry and Otolaryngology of the University of Turin. Data referring to patients under observation during the same period are compared. It is stressed that in order to obtain a statistically valid comparison of salivary gland neoplasms, the source of and chronological period relating to the sample group must be taken into consideration given the different statistical clinical methods adopted over the years by the two departments in question. The present study completes earlier research carried out by the same authors using this data.