Chemoradiotherapy-induced Changes in Mucinous Components in Rectal Cancer Tissue: Evaluation on High Iron Diamine-alcian Blue and Mucin 1 Staining.
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| Abstract | BACKGROUND/AIM: The standard treatment for rectal cancer is neoadjuvant chemoradiotherapy (nCRT) followed by surgery. Mucinous carcinoma responds poorly to nCRT. In some patients, mucin lakes (MLs) are induced by nCRT. Identifying whether MLs are induced or originally present would be of great importance. PATIENTS AND METHODS: We studied 20 patients with MLs (CRT-MC group) among 205 patients who received nCRT. Among 88 patients who did not receive nCRT, we studied 9 patients with mucinous carcinoma (non-CRT-MC group) and 18 patients with MLs in differentiated adenocarcinoma (non-CRT-AC group). Tumors were stained with high iron diamine-Alcian blue (HID-AB) and MUC1 staining. RESULTS: Rate of AB>HID staining of cancer cells was significantly higher in the CRT-MC group than in non-CRT-MC group (p=0.0004). Rate of MUC1 staining in MLs was significantly higher in the CRT-MC group (p=0.0254). CONCLUSION: nCRT can induce qualitative changes in mucinous components, however, other methods are required to distinguish induced components from originally existing components.
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| Authors | Hiroshi Miyakita, Sotaro Sadahiro, Yutaro Kamei, Takashi Ogimi, Gota Saito, Kazutake Okada, Akira Tanaka, Toshiyuki Suzuki, Hiroshi Kajiwara, Takeshi Akiba |
| Journal | Anticancer research (Anticancer Res) Vol. 38 Issue 8 Pg. 4783-4787 (Aug 2018) ISSN: 1791-7530 [Electronic] Greece |
| PMID | 30061249 (Publication Type: Journal Article) |
| Copyright | Copyright© 2018, International Institute of Anticancer Research (Dr. George J. Delinasios), All rights reserved. |
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