Systemic inflammation and immunological microenvironment in prognosis of solid tumors

The purpose of the research. To study prognostic significance of indicators of systemic inflammation of peripheral blood and relative indicators: neutrophil‑lymphocytic and platelet‑lymphocytic ratio, the course of squamous cell carcinoma of the oral mucosa and gastric adenocarcinoma.

Materials and methods. Prospective analysis of patients with squamous cell carcinoma of the oral mucosa and disseminated gastric adenocarcinoma was performed. Patients with verified diagnosis, without signs of inflammatory diseases in anamnesis, not receiving antibacterial and immunomodulatory therapy were selected. Overall survival and survival without progression were considered as the main estimated parameters.

Results. The selection criteria were met by 32 patients with disseminated gastric adenocarcinoma and 60 patients with squamous cell carcinoma of the oral mucosa. The prognostic value of relative indicators is determined: overall survival of patients with gastric adenocarcinoma with a low value of the neutrophil‑lymphocytic index is significantly higher than that of the rest of the cohort of patients: 16 months vs. 8 and 7 months (95 % CI (confidence interval) from 12 to 23 months, p=0.0382). Overall survival of patients with low platelet‑lymphocytic index was also higher: 16 months vs. 8 months (95 % CI from 11 to 24 months, р=0,0026). Different relapse‑free survival was noted in the group of patients with squamous cell head and neck cancer: patients with low index value it is 7 months vs. 2 months (95 % CI from 5 to 9 months, p=0.0499).

Conclusions. The results show the possibility of using immunological microenvironment of the tumor and indices, characterizing the systemic inflammation, for prognosis of gastric adenocarcinoma and squamous cell carcinoma of the oral mucosa.

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