1Department of Internal Medicine, Kangwon National University Hospital, Kangwon National University School of Medicine, Chuncheon, Korea.
2Department of Pathology, Kangwon National University Hospital, Kangwon National University School of Medicine, Chuncheon, Korea.
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*cytokeratin, †carcinoembryonic antigen, ‡neuron-specific enolase, §periodic acid-Schiff with diastase, ∥periodic acid-Schiff, ¶-, indicates negative; f+, focally positive; +, moderately positive; ++, strongly and diffusely positive.
*cytokeratin, †carcinoembryonic antigen, ‡neuron-specific enolase, §periodic acid-Schiff with diastase, ∥periodic acid-Schiff, ¶-, indicates negative; f+, focally positive; +, moderately positive; ++, strongly and diffusely positive.