The pathology and histopathology of asbestosis is reviewed. Topics include general information on the asbestos (1332214) industry; gross appearance of the pleurae, lungs, mediastinal glands, heart, and spleen; the asbestos fiber and the tissue reaction; microscopic appearances of the trachea and main bronchi, intrapulmonary cartilaginous bronchi, bronchioles, alveolar ducts, air sacs, alveoli, lymphatics, lymph glands, lymph nodes, pleura, the pulmonary vascular system, pulmonary connective tissue, and elastic tissue; and complications and sequelae.