Multiple Primary Neoplasms in Blacks Compared to Whites

SUMMARY-Incidence of multiple primary neoplasms in patients with an index cancer of the buccal cavity and pharynx was determined from 23 years ' experience of the Charity Hospital Tumor Registry. Expected cancers were calculated by the application of age-, sex-, and race-specific incidence rates to the person-years experience in the registry; these rates were compared to observed cancers. White males with primary cancers of the lip and mouth had a significantly increased risk of developing further cancer of the skin and lung. Black males with primary cancer of the salivary gland had a threefold increased risk which was accounted for by subsequent cancer of the lung and prostate. Black males with primary cancer of the mouth had a threefold increased risk, which was explained by subsequent additional cancers of th