Case 28 Answer

This week was a case of PCP (or now known as PJP) pneumonia. 

Note the characteristic perihilar, symmetric reticular infiltrates (resembling non-cardiogenic edema). This was confirmed at bronchoscopy

Don’t forget that PCP pneumonia can have a NEGATIVE chest X-ray in 10-40% of patients. (as can ANY pneumonia!)

More info: http://www.learningradiology.com/notes/chestnotes/pneumocytispage.htm