Heading 1 - Lippincott Williams & Wilkins

It's not size that defines the difference between a benign tumor and a malignant tumor. Another name for a malignant tumor is a cancer. If it's not size, what is it? It's something called invasiveness. It will eventually hit a blood or lymphatic vessel and then tumor cells can go inside the blood vessels and travel to other parts of the body. ................
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