What features help to differentiate a benign tumor from a malignant tumor? What tissues give rise to a carcinoma, a sarcoma, and a lymphoma?

DISCUSSION ESSAY

The annual incidence of cancer in the United States is estimated at 439.2 per 100,000 persons, with an annual rate of deaths due to cancer of 163.5 per 100,000 persons. Cancer ranks second, just behind heart disease, as a cause of death in the United States.

1. What features help to differentiate a benign tumor from a malignant tumor?
2. What tissues give rise to a carcinoma, a sarcoma, and a lymphoma?