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. 2019 Apr 29;13:118. doi: 10.1186/s13256-019-2054-3

Fig. 4.

Fig. 4

Hematoxylin and eosin stain of the primary lesion at necropsy. Approximately 20% of the lesion manifested several characteristics of squamous cell carcinoma as determined by the presence of intercellular bridges (arrow) and cytokeratin 5/6 positivity, indicating an adenosquamous carcinoma (a, b). CK5/6 cytokeratin 5/6