Case 33

Author: Dr. Manon Auger, Dept of Pathology, McGill University, Montreal, Canada

Reviewer: Ritu Nayar, MD. Northwestern University, Feinberg School of Medicine, Chicago, IL, USA

D. Benign: Viral cellular changes most consistent with Cytomegalovirus (CMV) infection (Discussion below)

A 45 year old man presented with an interstitial lung infiltrate. Significant medical history: HIV+.

Which of the following is the most likely diagnosis?