Immunohistochemistry or Molecular Analysis : Which Method Is Better for Subtyping Craniopharyngioma?

• Fukuhara, Noriaki

• Iwata, Takeo

• Inoshita, Naoko

• Yoshimoto, Katsuhiko

• Kitagawa, Masanobu

• Fukuhara, Hirokazu

• Tatsushima, Keita

• Yamaguchi-Okada, Mitsuo

• Takeshita, Akira

• Ito, Junko

• Takeuchi, Yasuhiro

• Yamada, Shozo

• Nishioka, Hiroshi

抄録

Craniopharyngioma (CP) is mainly classified into two pathological subtypes: adamantinomatous (ACP) and papillary (PCP). CTNNB1 (β-catenin) mutations are detected in ACPs, and the BRAF V600E mutation is detected in PCPs. However, genetic analysis is not always possible in general medical practice. In this study, we investigated whether immunohistochemistry could replace genetic analysis as an aid in subtype diagnosis. Here, 38 CP patients who had undergone their first tumor resection were included. Among the 38 cases, 22 were morphologically diagnosed as ACP, 10 cases were diagnosed as PCP, and six cases were diagnosed as undetermined CP that were morphologically difficult to classify as either ACP or PCP. Results of immunohistochemistry and genetic analysis and clinical features were compared. Based on the immunohistochemistry, 26 (22 ACPs and four undetermined CPs) showed nuclear β-catenin expression, 11 (nine PCPs and two undetermined CPs) exhibited positive BRAF V600E immunostaining and one PCP showed membranous β-catenin expression and negative for BRAF V600E immunostaining. Among the 26 nuclear β-catenin expression cases, 11 had CTNNB1 mutations; however, 15 cases had mutations of neither CTNNB1 nor BRAF V600E. All 11 BRAF V600E immunopositive cases had BRAF V600E mutations. When comparing clinical features between, pediatric patients and those with tumor calcification and less solid components on MRI more commonly had nuclear β-catenin expression tumors than BRAF V600E immunopositive tumors, reflecting the differences in clinical features between ACP and PCP. Accordingly, immunohistochemistry can replace genetic analysis as an aid to determine the subtype diagnosis of CP in general medical practice.

収録刊行物

• Endocrine Pathology

  Endocrine Pathology 32 (2), 262-268, 2020-09-23

  Springer Science+Business Media|Springer Nature

キーワード

• Craniopharyngioma
• CTNNB1
• β-Catenin
• BRAF V600E

詳細情報

• CRID: 1050571007519885824
• NII論文ID: 120007150220
• NII書誌ID: AA10803175
• ISSN: 15590097
• ISSN: 10463976
• DOI: 10.1007/s12022-020-09644-z
• Web Site: http://repo.lib.tokushima-u.ac.jp/115294
• Web Site: https://link.springer.com/content/pdf/10.1007/s12022-020-09644-z.pdf
• Web Site: https://link.springer.com/article/10.1007/s12022-020-09644-z/fulltext.html
• 本文言語コード: en
• 資料種別: journal article
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