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PD-L1 testing in metastatic triple negative breast cancer: Results of an Italian survey.
- Source :
-
Tumori [Tumori] 2024 Feb; Vol. 110 (1), pp. 44-48. Date of Electronic Publication: 2023 Sep 19. - Publication Year :
- 2024
-
Abstract
- Background: Immunotherapy has revolutionized the approach to metastatic triple-negative breast cancers. Atezolizumab was approved for patients with metastatic triple-negative breast cancers whose tumors express PD-L1, determined by SP 142 assay. To assess the availability and practice of SP142 test we administered a survey to all the 15 pathology departments of the Lazio Region during a six-month period.<br />Methods: The survey comprised 12 questions regarding the availability of SP142 in the pathology departments, the percentage of positive tests, the difficulties of pathologists in cases close to cut-off value and the tested samples.<br />Results: The SP142 assay was available in only eight centers. In case of positive result, most centers (5/8, 62.5%) reported values of PD-L1 expression ranging from > 1 to ⩽ 5%, with values close to the cut-off point (⩾ 1% or < 1%) being the greatest challenge.Most of the centers (6/8, 75%) tested material from both their own and other hospitals. In most centers, the evaluations were performed either on primary tumors or metastasis, in particular lymph nodes (5/8, 62.5%), followed by lung (3/8, 37.5%) and liver (1/8, 12.5%) metastasis.<br />Conclusion: Our results raise some important issues concerning the evaluation of PD-L1 in the "real-life" setting, providing strategies for its implementation.<br />Competing Interests: Declaration of conflicting interestsThe authors declared the following potential conflicts of interest with respect to the research, authorship, and/or publication of this article: Paolo Marchetti (PM) has/had a consultant/advisory role for BMS, Roche- Genentech, MSD, Novartis, Amgen, Merck Serono, Pierre Fabre, Incyte. The other authors declare they have no competing interests.
Details
- Language :
- English
- ISSN :
- 2038-2529
- Volume :
- 110
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Tumori
- Publication Type :
- Academic Journal
- Accession number :
- 37726962
- Full Text :
- https://doi.org/10.1177/03008916231196781