Abstract
Purpose
The aim of this study was to evaluate prognostic importance of programmed death-1 (PD-1) and/ or programmed death-ligand 1 (PD-L1) expressions in type 2 endometrial cancer.
Study design
Formalin-fixed, paraffin-embedded tissue samples from 53 cases with type 2 endometrial cancer were analyzed. One-third of our cases had serous adenocarcinoma (32%), 11 had clear cell (21%) and 25 had mixed-type adenocarcinoma (47%). PD-1 and PD-L1 expressions in tumor tissue and microenvironment were detected by immunohistochemistry. Clinical and pathological characteristics including age, stage, initial symptom, surgical procedure, myometrial invasion, lymphovascular space invasion (LVSI), lymph node invasion, adjuvant therapy, and survival were reviewed. The Kaplan–Meier and Cox proportional hazards models were used to evaluate the prognostic factors.
Results
PD-1 expression in tumor tissue and microenvironment was detected in 22 (42%) and 28 (53%) cases, respectively. PD-L1 expression was detected in tumor and microenvironment in 8 (15%) and in 15 cases (28%), respectively. Expression of PD-1 and PD-L1 expressions in tumor area was associated with shorter survival (p = 0.006 and 0.001, respectively) but PD-1 and PD-L1 expressions in microenvironment were not found to be related with survival. PD-1 (p = 0.006) and PD-L1 expressions (p = 0.001) in addition to LVSI (p = 0.005), myometrial invasion (p = 0.015), lymph node involvement (p = 0.019), and suboptimal cytoreduction (p = 0.042), were found to be associated with poor prognostic indicators. PD-1 and PD-L1 expressions in tumor and lymph node involvement were determined as independent prognostic factors.
Conclusion
PD-1 and PD-L1 expressions in type 2 endometrial cancers were found to be poor prognostic indicators.
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Acknowledgements
We thank Prof. Dr. Gulsah Seydaoglu for the help with the statistical analysis of this study.
Funding
This study was supported by the coordination unit of Scientific Research Projects (BAP- TSA-2015–4843) of Çukurova University.
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UKG: Protocol/project development; data collection or management; data analysis: manuscript writing/editing. EKB: Data collection or management; manuscript writing/editing. SP: Protocol/project development; manuscript writing/editing. ABG: Data collection or management; manuscript writing/editing. DG: Data collection or management; manuscript writing/editing. MAV: Data collection or management; manuscript writing/editing.
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Kucukgoz Gulec, U., Kilic Bagir, E., Paydas, S. et al. Programmed death-1 (PD-1) and programmed death-ligand 1 (PD-L1) expressions in type 2 endometrial cancer. Arch Gynecol Obstet 300, 377–382 (2019). https://doi.org/10.1007/s00404-019-05180-2
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DOI: https://doi.org/10.1007/s00404-019-05180-2