Hypoplasia of Right Ventricle and Tricuspid Valve in Siblings

in case of functional impairment of the lung due to excessive pleural thickening or to confirm the diagnosis of asl~estosis by open biopsy in difficult cases. The outlook for workers exposed to asbestos has improved greatly since the advent of better dust control systems; greater awareness of the condition; early removal of the affected worker from the job; better health care facilities for the workers; and the use of antibiotics and ancillary measures for improved tracheobronchial toilet. Patients now often live long enough to demonstrate the possil~le carcinogenic or cocarcinogenic effect of asbestos fibers.