Case 32

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

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

A 68 year old man presented with an interstitial lung infiltrate. Significant past medical history: renal transplant a few years ago. A virtual slide and 3 static images (Papanicolaou-stained slides) of the bronchoalveolar lavage are provided.

Fig.1. Papanicolaou stain, 200X
Fig.2. Papanicolaou stain, 400X
Fig.3. Papanicolaou stain, 600X

What is the most likely diagnosis of this case?