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Ts a 1 ivary-gland tumors based on signifi-( antly large numbers of cases. T h e tumors geneially are uncommon and certain of the many types extremely rare. Hence, in few institutions will there be sufficient material for full evaluation of even the more commonly recognized varieties. Tumors of the salivary glands have few rivals in histological diversification.
Foote et al. (Sun,) studied this question.
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