Cancer is a group of diseases characterized by uncontrolled growth and spread of abnormal cells. It is the second leading cause of death worldwide. Some key points:
- Over 9 million people die from cancer each year, with 70% of deaths occurring in low-to-middle income countries.
- Cancers are classified as carcinomas, sarcomas, lymphomas, myelomas, or leukemias depending on the type of cell affected.
- Risk factors include age, family history, lifestyle (tobacco, diet, physical activity), environmental/occupational exposures, and certain infections.
- Symptoms vary depending on the cancer type and location but may include lumps, unexplained weight loss