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Squamous cell carcinoma (SCC) and its variants are by far the most common malignancies at these locations, with very limited new insights. The most important is the introduction of new targeted treatment\u2014checkpoint inhibitors, with a new task for pathologists, who may help to predict the response to treatment by analyzing the expression of targeted proteins in biopsy samples.\u00a0Precancerous lesions remain a controversial topic and, similarly to other organs, it is acceptable to use the terms \u201cdysplasia\u201d or \u201csquamous intraepithelial lesion\u201d (SIL), but there is a slight difference between low-grade dysplasia and low-grade SIL: in the former, mild atypia must be present, while the latter also includes hyperplastic epithelium without atypia. Two approaches have been proposed: a two-tiered system with low- and high-grade dysplasia\/SIL and a three-tiered system with an additional category, carcinoma in situ. We are still searching for reliable diagnostic markers to surpass the subjectivity in biopsy diagnosis, with a few potential candidate markers on the horizon, e.g., stem cell markers.\u00a0Other tumors are rare at these locations, e.g., hematolymphoid, neuroendocrine and salivary gland neoplasms, and are no longer included in Chapter 3. They must be diagnosed according to criteria described in specific chapters. The same holds true for soft tissue tumors, with the exception of cartilaginous neoplasms, which are still included in Chapter 3.<\/jats:p>","DOI":"10.1007\/s12105-021-01405-6","type":"journal-article","created":{"date-parts":[[2022,3,21]],"date-time":"2022-03-21T11:03:42Z","timestamp":1647860622000},"page":"31-39","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":42,"title":["Update from the 5th Edition of the World Health Organization Classification of Head and Neck Tumors: Hypopharynx, Larynx, Trachea and Parapharyngeal Space"],"prefix":"10.1007","volume":"16","author":[{"given":"Nina","family":"Zidar","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nina","family":"Gale","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2022,3,21]]},"reference":[{"key":"1405_CR1","doi-asserted-by":"crossref","first-page":"1046","DOI":"10.1007\/s12105-020-01149-9","volume":"14","author":"N Gale","year":"2020","unstructured":"Gale N, Cardesa A, Hernandez-Prera JC, Slootweg PJ, Wenig BJ, Zidar N. 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