Esophageal carcinoma perforating into the lung on imaging

An axial CT through the lung apices shows a proximal esophageal carcinoma (arrow). Two weeks later (image B), there is a focal perforation into the right lung apex (arrow) with formation of a cavity in the lung (arrowhead). Image C is a PET-CT scan that shows hyper metabolic activity in the esophagus (arrow) and the lung cavity (arrowhead). Image D is a gastrograffin swallow that shows the perforation (arrow) and the cavity (arrowhead).