What are the characteristics of benign tumors and what are the characteristics of a malignant tumor?

Please select one of the following questions, and provide 150 – 200 word answer. Make sure you include the question with the answer so that everybody knows what question is being discussed.

1. What are the characteristics of benign tumors and what are the characteristics of a malignant tumor?
2. What are the definitions of the terms carcinoma, sarcoma, lymphoma, and leukemia?
3. How is cancer staged, and what are the implications of cancer staging?
4. What are proto-oncogenes and what are tumor-suppressor genes?
5. What metabolic changes in cancer cells support their growth and proliferation?
6. What is the role of inflammation in carcinogenesis and how do some viruses and bacteria contribute to tumor formation?
7. What are the major steps in metastasis?
8. What are paraneoplastic syndromes?
9. What are the mechanisms of cachexia in cancer?
10. What are causes and consequences of anemia, leukopenia, and thrombocytopenia in cancer?
11. What are the goals of surgery for cancer and what is the purpose of adjuvant and neoadjuvant chemotherapy?
12. What are tumor markers?
13. What are the trends in cancer incidence and what are the trends in cancer mortality?
14. How is obesity linked to cancer risk and what are some of the known dietary risk factors for cancer?
15. How is infection and sexual activity associated with cancer risk?
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