Injury to the urinary tract can result in collections of fluid known as a urinoma. It has the smell of normal urine. The urine arrives in the pleural space either retroperitoneally (under the peritoneum), or via the retroperitoneal lymphatics. Urine can reach the pleural space either directly or indirectly. It can reach directly, by going through pores in the thoracic diaphragm due to a pressure gradient, or by a rupture of a urinoma releasing the contents into the pleural space. It can also reach indirectly, when a urinoma drains into the pleural space via linkage between the lymphatics of the retroperitoneal and pleural regions.
Urinothorax
Hemothorax
Chylothorax
Hydropneumothorax
Hemopneumothorax
Pulmonary hematoma
Fibrothorax
Pneumothorax