Case 34
Author: Dr. Manon Auger, Dept of Pathology, McGill University, Montreal, Canada
Reviewer: Ritu Nayar, MD., Northwestern University, Feinberg School of Medicine, Chicago, IL, USA
G. Malignant: Squamous cell carcinoma (this is a poorly differentiated squamous cell carcinoma)
A 79 year old man presented with a 2cm nodule in the lingula; no other significant past medical history. 6 static images (Papanicolaou-stained slides) of the direct smear are provided.
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| Fig.1. Papanicolaou stain, 400X |
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| Fig.2. Papanicolaou stain, 400X |
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| Fig.3. Papanicolaou stain, 400X |
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| Fig.4. Papanicolaou stain, 600X |
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| Fig.5. Papanicolaou stain, 600X |
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| Fig.6. Papanicolaou stain, 600X |
Which of the following is the most likely diagnosis?