In this episode, we review the pathophysiology, clinical presentation and diagnostic approach to ILD - a heterogenous group of lung disorders characterized by diffuse parenchymal lung disease. We will talk briefly about management and treatment, as well as the PANTHER-IPF trial that shaped the treatment of IPF - a subtype of ILD. Written by: Dr. Jung-In Choi (Internal Medicine Resident)Reviewed by: Dr. Janice Leung (Respirology) and Dr. Laura Kuyper (General Internist)Sound Editing by: Dr. Nafis Hossain (Internal Medicine Resident)Infographic by: Dr. Shannon Gui (Internal Medicine Resident)