Etiology of Cancer Extrinsic factors Intrinsic facors Chemical carcinogens Hereditary factors o Chemotherapeutic Agents .Radiation Metal Fibers and dust .Dietary evirusEtiology of Cancer Extrinsic factors •Chemical carcinogens •Chemotherapeutic Agents •Radiation •Metal •Fibers and Dust •Dietary •Virus Intrinsic facors •Hereditary factors