cancer Flashcards
1
Q
what is cancer caused by?
A
by changes in cells leading to uncontrolled growth and division
2
Q
what are benign tumours surrounded by?
A
by a membrane and do not invade other parts of the body
3
Q
what are malignant tumour cells?
A
cancers
4
Q
what happens when malignant tumours spread?
A
form secondary tumours