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From Wikipedia, the free encyclopedia. A bronchopleural fistula (BPF) is a fistula between the pleural space and the lung. It can develop following pneumonectomy, post traumatically, or with certain types of infection. It may also develop when large airways are in communication with the pleural space following a large pneumothorax or other loss of pleural negative pressure, especially during positive pressure mechanical ventilation. On imaging, the diagnosis is suspected indirectly on radiograph.
A colovesical fistula is the presence of a communication between the lumen of the colon and that of the bladder, either directly or via an intervening abscess cavity (foyer intermediaire). When the communication is between the rectum and urinary bladder, the term rectovesical fistula is used.adiographic features. In most cases the fistula occurs thought the dome of the bladder (~ 60%). The posterior wall (~ 30%) and trigone (~ 10%) are less frequent sites 2. A colovesical fistulas and its cause can be visualised in a number of ways, although the fistulous tract itself is often difficult to demonstrated.