Case 31

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

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

Case history: A 47 year old man presented with an interstitial lung infiltrate; no other past significant history. A virtual slide and 7 static images (Papanicolaou-stained slides) of the bronchial washing are provided.

case_31_image_2 Fig.2. Papanicolaou stain, 400X case_31_image_3 Fig.3. Papanicolaou stain, 600X case_31_image_4 Fig.4. Papanicolaou stain, 400X case_31_image_5 Fig.5. Papanicolaou stain, 600X case_31_image_6 Fig.6. Papanicolaou stain, 600X case_31_image_7 Fig.7. Papanicolaou stain, 400X

What is the most likely diagnosis of this case?