Wan-Hsiang Hu1,2,3, Katsumi Miyai4, Luis C Cajas-Monson1, Linda Luo1,2, Lin Liu5, Sonia L Ramamoorthy1,2. 1. Department of Surgery, University of California San Diego Health System, San Diego, California. 2. Rebecca and John Moores Cancer Center, University of California San Diego Health System, San Diego, California. 3. Department of Colorectal Surgery, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan. 4. Department of Pathology, School of Medicine, University of California, San Diego, California. 5. Division of Biostatistics and Bioinformatics, School of Medicine, University of California, San Diego, California.
Abstract
BACKGROUND: The prognostic significance of tumor-infiltrating CD8(+) T lymphocytes in anal squamous cell carcinoma (SCC) remains unclear. We designed the study to investigate the association between CD8(+) T cells and clinical prognosis among anal SCC patients. METHODS: The density of CD8(+) T cells was assessed by immunohistochemistry. The numbers of CD8(+) T cells were counted and their relationship with clinicopathological factors and survival was explored. RESULTS: A strong positive correlation was noted between intratumoral and peritumoral CD8(+) T cells (r = 0.77, P < 0.001). High intratumoral and peritumoral CD8(+) T cells was associated with well tumor differentiation, early-stage diagnosis, and better prognosis (P < 0.05). Better disease-free survival rates were demonstrated in patients with high CD8(+) T cell density in intratumoral nest (P = 0.01); peritumoral stroma (P = 0.004); and both in combination (P = 0.01). High peritumoral CD8(+) T cell was associated with overall survival (P = 0.025). In HIV-infected patients, high CD8(+) T cell density also had association with disease-free survival (P < 0.05). CONCLUSIONS: High tumor-infiltrating CD8(+) T cell density showed the potential to indicate a favorable effect on prognosis and survival for anal SCC patients.
BACKGROUND: The prognostic significance of tumor-infiltrating CD8(+) T lymphocytes in anal squamous cell carcinoma (SCC) remains unclear. We designed the study to investigate the association between CD8(+) T cells and clinical prognosis among anal SCC patients. METHODS: The density of CD8(+) T cells was assessed by immunohistochemistry. The numbers of CD8(+) T cells were counted and their relationship with clinicopathological factors and survival was explored. RESULTS: A strong positive correlation was noted between intratumoral and peritumoral CD8(+) T cells (r = 0.77, P < 0.001). High intratumoral and peritumoral CD8(+) T cells was associated with well tumor differentiation, early-stage diagnosis, and better prognosis (P < 0.05). Better disease-free survival rates were demonstrated in patients with high CD8(+) T cell density in intratumoral nest (P = 0.01); peritumoral stroma (P = 0.004); and both in combination (P = 0.01). High peritumoral CD8(+) T cell was associated with overall survival (P = 0.025). In HIV-infectedpatients, high CD8(+) T cell density also had association with disease-free survival (P < 0.05). CONCLUSIONS: High tumor-infiltrating CD8(+) T cell density showed the potential to indicate a favorable effect on prognosis and survival for anal SCC patients.