Open Access

Histological tumor necrosis in pancreatic cancer after neoadjuvant therapy

  • Authors:
    • Masashi Kudo
    • Genichiro Ishii
    • Naoto Gotohda
    • Masaru Konishi
    • Shinichiro Takahashi
    • Shin Kobayashi
    • Motokazu Sugimoto
    • John D. Martin
    • Horacio Cabral
    • Motohiro Kojima
  • View Affiliations

  • Published online on: May 17, 2022     https://doi.org/10.3892/or.2022.8332
  • Article Number: 121
  • Copyright: © Kudo et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

The pathological prognostic factors in pancreatic cancer patients who have received neoadjuvant therapy (NAT) are still elusive. The aim of the present study was to investigate the prognostic potential of histological tumor necrosis (HTN) in patients who received NAT and to evaluate tumor changes after NAT. HTN was studied in 44 pancreatic cancer patients who received NAT followed by surgery (NAT group) compared with 263 patients who received upfront surgery (UFS group). The prognostic factors in the NAT group were analyzed, and carbonic anhydrase 9 (CA‑9) expression was compared between the NAT and USF group to evaluate the hypoxic microenvironment changes during NAT. HTN was found in 15 of 44 patients in the NAT group, and its frequency was lower than that in the UFS group (34 vs. 51%, P=0.04). Cox proportional hazards models identified HTN as an independent risk factor for relapse‑free survival in the NAT group [risk ratio (RR), 5.60; 95% confidence interval (CI): 2.27‑14.26, P<0.01]. Significant correlations were found between HTN and CA‑9 expression both in the NAT and UFS groups (P<0.01 for both). CA‑9 expression was significantly upregulated in the NAT group overall, although this upregulation was specifically induced in patients without HTN. In conclusion, HTN was a poor prognostic factor in pancreatic cancer patients receiving NAT followed by surgery, and the present study suggests a close association between HTN and tumor hypoxia. Increased hypoxia after NAT may support the thesis for re‑engineering the hypoxia‑alleviating tumor microenvironment in NAT regimens for pancreatic cancer.
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July-2022
Volume 48 Issue 1

Print ISSN: 1021-335X
Online ISSN:1791-2431

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Spandidos Publications style
Kudo M, Ishii G, Gotohda N, Konishi M, Takahashi S, Kobayashi S, Sugimoto M, Martin JD, Cabral H, Kojima M, Kojima M, et al: Histological tumor necrosis in pancreatic cancer after neoadjuvant therapy. Oncol Rep 48: 121, 2022
APA
Kudo, M., Ishii, G., Gotohda, N., Konishi, M., Takahashi, S., Kobayashi, S. ... Kojima, M. (2022). Histological tumor necrosis in pancreatic cancer after neoadjuvant therapy. Oncology Reports, 48, 121. https://doi.org/10.3892/or.2022.8332
MLA
Kudo, M., Ishii, G., Gotohda, N., Konishi, M., Takahashi, S., Kobayashi, S., Sugimoto, M., Martin, J. D., Cabral, H., Kojima, M."Histological tumor necrosis in pancreatic cancer after neoadjuvant therapy". Oncology Reports 48.1 (2022): 121.
Chicago
Kudo, M., Ishii, G., Gotohda, N., Konishi, M., Takahashi, S., Kobayashi, S., Sugimoto, M., Martin, J. D., Cabral, H., Kojima, M."Histological tumor necrosis in pancreatic cancer after neoadjuvant therapy". Oncology Reports 48, no. 1 (2022): 121. https://doi.org/10.3892/or.2022.8332