Not CA, can get big
Cancers (malignant) tumors lose normal control with other cells, have unrestricted growth; they can enlarge, spread by blood or lymph.
Can be fatal.
Benign tumors are abnormal, but not cancers. Can get big, but don't spread by blood or lymph. Generally not fatal, although benign brain tumors can cause a lot of trouble-not much room to spare in the skull.