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. Author manuscript; available in PMC: 2015 May 1.
Published in final edited form as: Oral Maxillofac Surg Clin North Am. 2014 May;26(2):123–141. doi: 10.1016/j.coms.2014.01.001

Figure 7.

Figure 7

Histologic variants of squamous cell carcinoma. (A)Verrucous carcinoma showing a broad base, minimal cytologic atypia and exophytic spire growth;(B) Papillary squamous carcinoma showing exophytic growth of fibrovascular cores covered by full thickness neoplastic cells without keratinization; (C) Basaloid squamous carcinoma with high-grade features and scant cytoplasm often lacking keratinization as in this example; (D) Sarcomatoid (spindle cell) carcinoma haphazardly growing in sheets with pleomorphism and mitoses, often retaining cytokeratin expression detected by immunohistochemical staining (inset) which aids in differentiating from true sarcomas.