Kanser, or cancer, is a group of diseases characterized by the uncontrolled growth and spread of abnormal cells in the body. These cells can form tumors, which may be benign (non-cancerous) or malignant (cancerous). If left untreated, malignant tumors can invade nearby tissues and organs, leading to serious health complications. There are many types of kanser, including breast cancer, lung cancer, and prostate cancer. Risk factors for developing kanser can include genetics, lifestyle choices, and environmental exposures. Early detection through screenings and regular check-ups can improve treatment outcomes and survival rates.