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13-11-2023 | ORIGINAL ARTICLE

Expression of CD5 in salivary gland tumors: an ancillary marker for carcinoma showing thymus-like differentiation (CASTLE) of the major salivary gland

Authors: Eiichi Sasaki, Hoshino Terada, Naoki Oishi, Akari Iwakoshi, Katsuhiro Masago, Hirokazu Matsushita, Hidetaka Yamamoto, Nobuhiro Hanai, Hisashi Tateyama

Published in: Virchows Archiv | Issue 6/2024

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Abstract

Recently, cases of carcinoma showing thymus-like differentiation (CASTLE) occurring in major salivary glands have been identified. To assess the diagnostic value of CD5 immunohistochemistry in distinguishing salivary CASTLE from other types of salivary gland tumors, we evaluated CD5 expression in 109 salivary gland tumors, encompassing 23 different histological types, including salivary CASTLE. In addition, we reviewed 10 previously reported cases of salivary CASTLE. Most salivary CASTLE cases (10/11, 91%) showed strong CD5 expression. In contrast, 104 of 108 (96%) non-salivary CASTLE tumors were negative for CD5, while the remaining four tumors (3.7%), all of which were histologically Warthin tumors, showed focal positivity for CD5 with weak to moderate intensity. In conclusion, the findings in this study support the potential use of CD5 immunohistochemistry for distinguishing salivary CASTLE from other histological types of salivary gland tumors. Aberrant CD5 expression in this tumor may be linked to the tumor microenvironment.
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Metadata
Title
Expression of CD5 in salivary gland tumors: an ancillary marker for carcinoma showing thymus-like differentiation (CASTLE) of the major salivary gland
Authors
Eiichi Sasaki
Hoshino Terada
Naoki Oishi
Akari Iwakoshi
Katsuhiro Masago
Hirokazu Matsushita
Hidetaka Yamamoto
Nobuhiro Hanai
Hisashi Tateyama
Publication date
13-11-2023
Publisher
Springer Berlin Heidelberg
Published in
Virchows Archiv / Issue 6/2024
Print ISSN: 0945-6317
Electronic ISSN: 1432-2307
DOI
https://doi.org/10.1007/s00428-023-03701-8