Pulmonary excretion of foreign bodies and necrotic material from the bladder wall.

Following injection of carbon suspension into the bladder wall of white rats, carbon particles were observed in the cytoplasm of cells located as the alveolar macrophages. Following injections of a solution of AgNO3 into the bladder wall of white rats, dark stained spots were observed in the cytoplasm of cells located as the alveolar macrophages. It is suggested that pulmonary excretion of carbon particles and silver stained necrotic material from the bladder wall takes place. These results may contribute to the problems involved by pulmonary changes observed in the X-irradiated patients with carcinoma of the bladder.