The correct answer is C: Small-cell carcinoma
Comment: This was originally diagnosed as a small-cell carcinoma of the lung. However, the cells exceed the size criteria of scanty cytoplasm and a diameter no more than three resting lymphocytic nuclei. The cytoplasm is also abundant. A panel of experts classified this as a small-cell carcinoma of the lung, intermediate grade. The case illustrates the ambiguity in some of our diagnostic criteria.
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