Cancer is a group of diseases marked by uncontrolled cell growth, which can form tumors and disrupt normal body functions. It can affect nearly any organ and be either benign (non-cancerous) or malignant (cancerous). Key Points: Causes: Triggered by genetic mutations from inherited traits or exposure to factors like tobacco, UV rays, chemicals, or infections. Types: Includes breast, lung, colon, prostate, leukemia, and more—named by the organ where it starts. Stages: Ranges from Stage 0 (localized) to Stage IV (advanced spread), guiding treatment and prognosis. Treatment: Options include surgery, chemotherapy, radiation, immunotherapy, and targeted therapies—often used in combination. Prevention: Healthy habits—avoiding tobacco, eating well, exercising, sun protection, and vaccinations—can lower risk. Screening: Early detection through tests like mammograms, colonoscopies, and Pap smears improves outcomes. Advances: Research in genetics and personalized medicine is transforming cancer care with more precise, tailored treatments. Cancer remains a global health challenge, but progress continues through early detection, innovative therapies, and collaborative care.