Oops, you're using an old version of your browser so some of the features on this page may not be displaying properly.

MINIMAL Requirements: Google Chrome 24+Mozilla Firefox 20+Internet Explorer 11Opera 15–18Apple Safari 7SeaMonkey 2.15-2.23

Poster Display session 2

4906 - Tumor-infiltrating lymphocytes (TILs) in patients with epithelial ovarian cancer undergoing neoadjuvant chemotherapy: A restrospective study

Date

29 Sep 2019

Session

Poster Display session 2

Presenters

Sara Giovannoni

Citation

Annals of Oncology (2019) 30 (suppl_5): v403-v434. 10.1093/annonc/mdz250

Authors

S. Giovannoni1, A. Garbi2, G. Parma2, M. Lapresa2, E. Zaccarelli2, A. Vingiani3, I. Ardoino4, G. Pruneri5, N. Colombo1

Author affiliations

  • 1 Gynaecological Oncology, IEO- Istituto Europeo di Oncologia, 50012 - Milan/IT
  • 2 Gynaecological Oncology, IEO- Istituto Europeo di Oncologia, 20141 - milan/IT
  • 3 Pathology, IEO- Istituto Europeo di Oncologia, 20141 - milan/IT
  • 4 Statistics;clinical Sciences And Community Helath, University of Milan, 20122 - milan/IT
  • 5 Pathology, INT Istituto Nazionale Tumori, 20133 - milan/IT
More

Resources

Abstract 4906

Background

The role of the adaptive immune response in tumors has been widely explored.TILs are related with a better survival in several tumors. In ephitelial ovarian cancer (EOC) there are few data focusing on the effects of neoadjuvant chemotherapy (NACT) on T-cell infiltration, with controversial results.TILs may represent a prognostic and predictive biomarker and may have a role in selecting patients for immunotherapy.

Methods

We retrospectively evaluated 131 patients with stage IIIC-IV EOC who received NACT with platinum and taxane, interval debulking surgery (IDS) and chemotherapy post IDS.14 patients were excluded due to complete response. Stromal and Intratumoral TILs (sTILs-iTILs) were evaluated in tumor biopsies (pre NACT samples) and on residual disease post surgery (post NACT samples), using the criteria defined by the International TILs Working Group. The objective of the study was evaluating whether NACT could determine an increase T-cell infiltration with a consequent positive effect on outcome.

Results

Median follow up was 70.25 months.OS at 2 and 5 years were 68.6% (95%CI: 61.0%-77.1%) and 26.8% (95%CI:19.5%-36.8%) respectively.In the final analysis 50 patients were excluded due to the lack of suitable pre NACT samples.There was no association between sTILS or iTILs values assessed on pre and/or post NACT samples with OS (HR = 0.99; HR = 1.01 respectively) and PFS (HR = 0.99; HR = 1.002 respectively). However, investigating the difference of sTILs between post (median 12; IQR 6-20) and pre NACT samples (median 7; IQR 3.25-17), we found that an increase in sTILs in post NACT compared to pre NACT samples was associated with reduced mortality risk (HR = 0.71; 95% CI: 0.50-1.00 p = 0.05).Furthermore a no-linear association between the difference between post and preNACT iTILs and OS was detected (p = 0.11).

Conclusions

These findings, although limited by the small sample size and the retrospective nature of this analysis, suggest a possible role of TILs detected in residual tumor after NACT as prognostic biomarker in EOC. Further data are needed in order to confirm the role of TILs after NACT and their possible relevance to predict efficacy of immunotherapeutic strategies in this setting.

Clinical trial identification

Editorial acknowledgement

Legal entity responsible for the study

Nicoletta Colombo, Sara Giovannoni.

Funding

Has not received any funding.

Disclosure

All authors have declared no conflicts of interest.

This site uses cookies. Some of these cookies are essential, while others help us improve your experience by providing insights into how the site is being used.

For more detailed information on the cookies we use, please check our Privacy Policy.

Customise settings