Abstract
Introduction
The density and distribution of the tumor immune microenvironment associated with brain metastases (BM) from gynecologic malignancies are unknown and have not been previously reported. We sought to describe the clinical features of a cohort of patients with BM from gynecologic malignancies and to characterize the tumor immune microenvironment from available archival surgical specimens.
Methods
We performed a retrospective review of electronic medical records from 2002 to 2018 for patients with BM from gynecologic malignancies. Data on patient characteristics, treatment regimens, and clinical outcomes were procured. CD4, CD8, CD45RO, CD68, CD163, and FOXP3 immunohistochemistry were evaluated from available archival surgical specimens from primary disease site and neurosurgical resection.
Results
A cohort of 44 patients with BM from gynecologic malignancies was identified, 21 (47.7%) endometrial primaries and 23 (52.3%) ovarian primaries. Tumor-infiltrating lymphocytes (TILs) and tumor-associated macrophages (TAMs) were evaluated in 13 primary cases and 15 BM cases. For the 13 primary cases, CD4+ TILs were evident in 76.9% of cases, CD8+ in 92.3%, CD45RO+ in 92.3%, and FOXP3+ in 46.2%, as well as CD68+ TAMs in 100% and CD163+ in 100%. For the 15 BM cases, CD4+ TILs were evident in 60.0% of cases, CD8+ in 93.3%, CD45RO+ in 73.3%, and FOXP3+ in 35.7%, as well as CD68+ TAMs in 86.7% and CD163+ in 100%.
Conclusion
An active tumor immune microenvironment is present with similar distribution in the primary disease site and BM from patients with gynecologic malignancies.
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Acknowledgements
We thank Dana-Farber/Harvard Cancer Center in Boston, MA, for the use of the Specialized Histopathology Core, which provided histology and immunohistochemistry service. Dana-Farber/Harvard Cancer Center is supported in part by an NCI Cancer Center Support Grant # NIH 5 P30 CA06516.
Funding
This study was funded by Department of Obstetrics, Gynecology, and Reproductive Science Innovation Award; Icahn School of Medicine at Mount Sinai.
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Corey M. Gill contributed to conceptualization, methodology, formal analysis, investigation, data curation, writing—original draft, writing—review and editing, visualization, and funding acquisition; Megan D’Andrea, Shannon Tomita, Jessa Suhner, Melissa Umphlett, and Konstantin Zakashansky contributed to investigation and writing—review and editing; Stephanie Blank, Nadejda Tsankova, and Raj Shrivastava contributed to resources, writing—review and editing, and supervision; Mary Fowkes contributed to conceptualization, methodology, resources, writing—review and editing, and supervision; Valentin Kolev contributed to conceptualization, methodology, resources, writing—original draft, writing—review and editing, supervision, and funding acquisition.
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Gill, C.M., D’Andrea, M.R., Tomita, S. et al. Tumor immune microenvironment in brain metastases from gynecologic malignancies. Cancer Immunol Immunother 70, 2951–2960 (2021). https://doi.org/10.1007/s00262-021-02909-4
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DOI: https://doi.org/10.1007/s00262-021-02909-4