CHARACTERISTICS OF MALIGNANT TUMORS
Why do malignant tumors in cancer endanger life? When the malignant
tumor expands, it presses against surrounding cells and tissues,
showing two dangerous characteristics: its invasive nature, or its
tendency to invade outlying tissues, and its metastatic nature,
or its tendency to travel to other parts of the body through blood
or lymphatic channels and grow there.
It is commonly recognized that damaged DNA causes these malignant
tumors which lose control over the formation of cells through cell
division. The cells grow uncontrollably by unlimited mitosis, and
when they expand into adjacent tissues, they cause damage. What
is even more worrisome is that the human body is filled with blood
vessels and lymphatic, which may carry the abnormal cells from one
tissue area to another, where they will set up new foci of abnormal
growth. These are the special features of cancer invasion and metastasis.