Case 35

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 83 year old man presented with a single nodule in the right middle lobe of the lung; no other significant past medical history.

Which of the following is the most likely diagnosis?