Interpreting thoracic radiographs can be very challenging. Thankfully, if you have an organized approach reading the study (extra-thoracic structures, pleural space, pulmonary parenchyma, cranial/middle/caudal mediastinum) and you stick to the foundational principles of radiographic interpretation (anatomy + roentgen signs + VITAMIN-D), identifying the findings and putting them together to formulate an appropriate radiographic diagnosis is much easier. This case will give you the opportunity to practice using all the Roentgen signs together in order to come up with your primary differential diagnosis.