Cancer is a group of diseases characterized by uncontrolled cell division that leads to abnormal tissue growth. Many a times, people often use the terms cancer and tumor synonymously. But all tumours are not cancerous.
There are two main types of tumors: malignant tumours and benign tumours:-
Malignant tumours: These are the cancerous cells that can invade and destroy surrounding healthy tissue, including organs. The cancer can spread to distant parts of the body through the lymphatic system or bloodstream. Not all tumours are cancerous.
Benign tumours: These types of tumours do not grow uncontrollably or do not invade neighboring tissues. They do not spread throughout the body.
There are over 200 different known cancers that affect humans. Most of the cancers are named from where they start. For example, lung cancer starts in the lung, and breast cancer starts in the breast. The spread of cancer from one part of the body to another is called metastasis. Symptoms and treatment depend on the cancer type and how advanced it is. Most treatment plans may include surgery, radiation and/or chemotherapy.