<prompt> Radon exposure is known to causeCarcinoma lungLeukemiaCarcinoma colonBrain tumors  <response>: ETIOLOGY OF CANCERS OF LUNG Chromium, Nickel, other metals Tobacco smoking, Ionising radiation uranium Radon. Asbestosis May predispose to Bronchogenic carcinoma, mesothelioma, gastrointestinal cancer. Suspected Carcinogens 