A 64 year old man with a 60 pack year smoking history was seen by his local physician for fatigue.He also reported having lost 20 pounds over the previous two months,while eating his normal diet.Chest x-ray disclosed a 4 cm mass near the left lung hilum.An endoscopic biopsy was performed,a representative section of which is shown in the accompanying photomicrograph.Which one of the following is the best diagnosis?

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Quizplus · Accepted Answer

The small,blue cells with little cytoplasm are typical of small cell carcinomAMitotic figures may be frequent (M),and the tumour is often found to be metastatic at the time of diagnosis.

A 64 Year Old Man with a 60 Pack Year