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. 2017 Mar;11(1):16-22.
doi: 10.1007/s12105-017-0787-0. Epub 2017 Feb 28.

Update From The 4th Edition of the World Health Organization Classification of Head and Neck Tumours: Nasopharynx

Edward B Stelow  1 , Bruce M Wenig  2
Affiliations

Update From The 4th Edition of the World Health Organization Classification of Head and Neck Tumours: Nasopharynx

Edward B Stelow et al. Head Neck Pathol. 2017 Mar.

Abstract

The current WHO classification system for tumors of the head and neck has made few changes from the previous edition with regards to tumors of the nasopharynx. The classification system is discussed here with particular attention to nasopharyngeal carcinoma, nasopharyngeal papillary adenocarcinoma, salivary gland anlage tumor, hairy polyp, juvenile angiofibroma, and other tumors.

Keywords: Adenocarcinoma; Angiofibroma; Anlage; Carcinoma; Nasopharynx; Papillary; Salivary gland; Squamous cell carcinoma; WHO.

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Conflict of interest statement

Conflict of interest

Drs. Wenig and Stelow have no conflict of interest.

Human and Animal Participants

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

Figures

Fig. 1
Fig. 1
Nonkeratinizing nasopharyngeal carcinoma: These tumors are further sub-classified as differentiated (a) and undifferentiated (b) based upon whether epithelial differentiation is more or less apparent
Fig. 2
Fig. 2
Nasopharyngeal papillary adenocarcinoma: these tumors are invariably low grade and composed of delicate arborizing papillae and tubules lined by a single layer of bland columnar to cuboidal epithelial cells
Fig. 3
Fig. 3
Salivary gland anlage tumor: this tumor appeared cellular and somewhat nodular from low power (a). Bland squamous nests and small cysts were present admixed with spindled cells (b) and tubules (c). Other areas were composed mostly of bland tubules with immature epithelial and stromal elements (d)
Fig. 4
Fig. 4
Juvenile Angiofibroma: a typical case with small delicate vessels, occasional larger more muscular vessels and bland spindled stromal cells
See this image and copyright information in PMC

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