Dr. Kevan Mehta is a Pediatric Respirologist and Sleep Medicine Physician and Assistant Professor at McMaster, with special expertise in management of ventilated patients. Dr. Yongdong Wang is an Associate Professor of radiology, graduating from Diagnostic Radiology at the Beijing Medical University in 1994. Dr. Jorge Arredondo is a Pathologist and Associate Professor with McMaster University. In this session of Grand Rounds, they present an interesting respiratory case that involved a broad differential across multiple specialties and required work-up from many different perspectives to come to the final diagnosis. This case will test your diagnostic skills- come with your thinking caps on! Presenting case history, reviewing the patient’s imaging, discussing their multi-disciplinary approach, reviewing of the pathology, and the outcome/management of this approach, allowed these physicians to determine the correct diagnosis for the patient in a short time frame and provide the appropriate treatment.