total frequency of neoplasms and that of malignant tumors in the younger age group amounted to 78 or 42 % , and in the older age age group to 66 and 31 % respectively , while in the corresponding age groups the figures were as follows : 48 or 7 % ( p less than 0.05 ) .
C0027651
neoplasms
C0006826
malignant tumors