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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Antigen-processing (AP) components are downregulated with varying frequency in head and neck cancer (HNC). Studies on AP component expression alterations were performed on primary HNC samples and/or on HNC cell lines.