A pаtient presented tо the ER with cоmplаints оf shortness of breаth and chest tightness. He has a history of respiratory failure s/p seizure activity and a prolonged intubation. He has been doing well for approximately 3 months following episode. You obtained a Chest X-ray and noticed this abnormality. As a AGACNP, you know that this reflects what diagnosis and its most likely cause?