If the balance of cell division and death is disturbed, a tumor can form. Problems with the immune system can result in tumors. Tobacco is one of the largest causes of tumors in the human body. Other substances that can result in tumors include: Benzene and other chemicals and toxins, poisonous mushrooms, drinking excessive alcohol, obesity, excessive sunlight, radiation and viruses. The types of cancer caused by viruses include cervical cancer (caused by human papillomavirus) and Hepatocellular carcinoma (hepatitis B virus).
Image of human tumor captured with a biological laboratory microscope and the Jenoptik C5 microscope camera.
You can reduce the risk of cancerous tumors by eating a healthy diet, exercising regularly, limiting alcohol intake, maintaining a healthy weight, reducing sun exposure and not smoking or choosing tobacco.