A 25 year old male is coming to you with shortness of breath…

A 25 year old male is coming to you with shortness of breath that has been persistent for some time.  He is trying to be more active, but this has been limiting him.  Past medical history includes having Hodgkin’s Lymphoma at age 15.  He was treated with chemotherapy that included bleomycin and also received radiation to the mediastinum.  Which of the following should you suspect?