thirdly , , the fact that malignant teratomas are easily produced by transplanting early embryos to extrauterine sites , while there is loss of malignancy with differentiation within a tumour or when malignant cells are injected into pre-implantation embryos and contribute cells to a variety of normal tissues , suggests that the malignant potential of teratomas has to do with gene control rather than mutational events .
C0006826
malignancy
C0334227
malignant cells