oncofetal marker

on·co·fe·tal mark·'er

a tumor marker produced by tumor tissue and by fetal tissue of the same type as the tumor, but not by normal adult tissue from which the tumor arises.

on·co·fe·tal mark·er

(on'kō-fē'tăl mahrk'ĕr) A tumor marker produced by tumor tissue and by fetal tissue of the same type as the tumor, but not by normal adult tissue from which the tumor arises.