Head and Neck Pathology

, Volume 12, Issue 1, pp 9–12 | Cite as

Human Papillomavirus-Related Neuroendocrine Carcinomas of the Head and Neck

Proceedings of the North American Society of Head and Neck Pathology Companion Meeting, March 18, 2018, Vancouver, British Columbia, Canada

Abstract

Human papillomavirus (HPV)-related head and neck carcinoma (HNC) represents an important subgroup of head and neck cancer that is characterized by a consistent microscopic appearance and a favorable prognosis. A growing experience with HPV testing, however, has uncovered variants that deviate from the prototypic HPV-HNC with respect to morphology. While these HPV-HNCs may deviate morphologically from the prototype, they do not appear to stray far from the favorable clinical outcome assigned to HPV-positive status. In effect, HPV positivity trumps traditional prognostic features predicated on morphology such as tumor grade and histologic subtype when it comes to predicting clinical behavior. For the diagnostic pathologist, the pedestrian task of tumor grading and subtyping would seem to be of little prognostic or therapeutic relevance when it comes to HPV-HNC. Recognition and documentation of neuroendocrine differentiation is a most notable exception. Forms of HPV-HNC have now been reported that morphologically resemble small cell carcinoma (SCC) and large cell neuroendocrine carcinoma (LCNEC) of other sites, and that immunohistochemically exhibit neuroendocrine differentiation. Despite the presence of HPV, these SCCs and LCNECs share the same aggressive clinical behavior of their counterparts in the lung and other sites where the high grade neuroendocrine phenotype is associated with early distant spread and poor overall survival. Consequently, the high grade neuroendocrine phenotype should be regarded as an aggressive form of HPV-HNC where tumor morphology displaces HPV positivity as the most important prognostic feature.

Keywords

Human papillomavirus Small cell carcinoma Large cell neuroendocrine carcinoma Neuroendocrine differentiation Head and neck cancer Non-keratinizing squamous cell carcinoma INSM1 

Notes

Compliance with Ethical Standards

Conflict of interest

William Westra declares that he has no conflict of interest.

Ethical Approval

This article does not contain any studies with human participants or animals performed by any of the authors.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of PathologyThe Icahn School of Medicine at Mount Sinai HospitalNew YorkUSA

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