2006-10-14 14:18:27 · 4 answers · asked by john cena 1 in Science & Mathematics ➔ Biology
Malignant cancer cells have a higher rate of multiplication as compared to normal cells, you keep killing them, they keep coming back, moreover benign tumours are well circumscribed and encapsulated , so they can very easily be shelled out, Benign tumours grow by expansion they do not infiltrate into the surrounding normal tissues. Malignant tumours grow by infiltration, so you can never be sure about the microscopic spread of the tumour it may well be beyond the visible spread, so it is very difficult to remove a malignant tumour.
2006-10-14 18:18:30 · answer #1 · answered by virgodoll 4 · 0⤊ 0⤋
Hi. They take over the bodies resources and grow at a highly accelerated rate. The cells themselves are not too difficult to kill, but the reproduction rate gives then an advantage over cells growing normally.
2006-10-14 21:20:40 · answer #2 · answered by Cirric 7 · 0⤊ 0⤋
It's not so much that they're hard to kill. It's finding something that will kill them and not kill healthy cells.
2006-10-14 21:22:29 · answer #3 · answered by Nomadd 7 · 0⤊ 0⤋
because they coincide with your good cells so to kill them you have to destroy your good cells as well
2006-10-14 21:23:32 · answer #4 · answered by redhead 2 · 0⤊ 0⤋