Figure 4. Purulent collection in right thoracic wall. During thoracotomy, a purulent collection through the thoracic wall was identified. It had extensive compromise that included connective tissue, muscle and the costal cartilage of the 6th, 7th, and 8th right costal arch. White arrow shows a cyst adhering to the right lung and the diaphragm, which internally communicated with the active drain point of the purulent collection.