Malignant is a medical term describing cancerous tumours or conditions that can invade surrounding tissues and spread to other parts of the body. Unlike benign growths that remain localized, malignant tumours grow aggressively and can be life-threatening without treatment. The distinction between malignant and benign determines treatment approaches and prognosis. Cancer diagnosis, treatment, and research fall under provincial healthcare systems, with municipalities occasionally involved through public health education, workplace safety programs, and support for cancer care facilities. Understanding basic medical terminology helps citizens navigate healthcare information and communicate effectively with medical professionals.