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Sangkhamanon S, Kotano N, Sirithanaphol W, Rompsaithong U, Kiatsopit P, Sookprasert A, Wirasorn K, Twinprai P, Watcharenwong P, Chindaprasirt J. Programmed death‑ligand 1 expression in tumor cells and tumor‑infiltrating lymphocytes are associated with depth of tumor invasion in penile cancer. Biomed Rep 2023; 19:44. [PMID: 37324166 PMCID: PMC10265570 DOI: 10.3892/br.2023.1627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 04/25/2023] [Indexed: 06/17/2023] Open
Abstract
The present study aimed to demonstrate the proportion of the programmed death-ligand 1 (PD-L1) expression in penile cancer patients and the association with clinicopathological parameters. Formalin-fixed paraffin-embedded specimens were obtained from 43 patients with primary penile squamous cell carcinoma treated at Srinagarind Hospital, Faculty of Medicine, Khon Kaen University, between 2008 and 2018. PD-L1 expression was evaluated by the immunohistochemistry using an SP263 monoclonal antibody. PD-L1 positivity was defined as >25% tumor cell staining or >25% tumor-associated immune cell staining. The correlation between PD-L1 expression and clinicopathological parameters was analyzed. A total of eight of 43 patients (18.6%) were identified as positive for PD-L1 expression in tumor cells and tumor-infiltrating lymphocytes. In the PD-L1 positive group, there was a significant association with pathological T stage (P=0.014) with a higher percentage of PD-L1 positive tumors in T1 stage compared with T2-T4 stage. In this cohort, there was a trend towards longer survival in patients with positive PD-L1 expression (5-year OS: 75% vs. 61.2%, P=0.19). Lymph node involvement and the location of tumor at the shaft of penis were two independent prognostic factors for survival. In conclusion, the PD-L1 expression was detected in 18% of penile cancer patients and high expression of PD-L1 was associated with the early T stage.
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Affiliation(s)
- Sakkarn Sangkhamanon
- Department of Pathology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Natcha Kotano
- Department of Pathology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Wichien Sirithanaphol
- Division of Urologic Surgery, Department of Surgery, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Ukrit Rompsaithong
- Division of Urologic Surgery, Department of Surgery, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Pakorn Kiatsopit
- Division of Urologic Surgery, Department of Surgery, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Aumkhae Sookprasert
- Division of Medical Oncology, Department of Internal Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Kosin Wirasorn
- Division of Medical Oncology, Department of Internal Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Prin Twinprai
- Department of Radiology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Piyakarn Watcharenwong
- Division of Medical Oncology, Department of Internal Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Jarin Chindaprasirt
- Division of Medical Oncology, Department of Internal Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
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