The correlation between platelet-lymphocyte ratio and the prognosis of patients with peripheral T-cell lymphoma, unspecified

Objective: To identify the correlation between pre-treatment peripheral blood platelet-lymphocyte ratio (PLR) and the clinicopathological features of the patients with peripheral T cell lymphoma, unspecified (PTCL-U), and to explore the prognostic significance of PLR in these patients.Methods: The clinical characteristics and survival state of 163 patients diagnosed of PTCL-U in Tianjin Medical University Cancer Institute and Hospital were analyzed retrospectively. All patients were divided into low PLR group (PLR < 170, n = 80) and high PLR group (PLR ≥ 170, n = 83) based on the receiver operating characteristic (ROC) curve’s cut-off value. The relationship between pre-treatment PLR and the prognosis of these patients was analyzed. Results: In all 163 patients with PTCL-U, the 5-year overall sarvival (OS) and progression-free survival (PFS) rates of patients in low PLR group (76.3% and 60.0%, respectively) were higher than those in high PLR group (10.8% and 8.4%, respectively, both P < 0.05). Age, Eastern Cooperative Oncology Group performance status (ECOG PS), B symptoms, serum lactate dehydrogenase (LDH) level, platelet and PLR were remarkably relevant to OS (all P < 0.01). Age, serum LDH level, platelet and PLR were independent prognostic features for patients with PTCL-U (all P < 0.05). Conclusion: The peripheral blood PLR at pre-treatment is distinctly relevant to the prognosis of patients with PTCL-U. An elevated PLR predicts poor prognosis of these patients. DOI:10.3781/j.issn.1000-7431.2017.33.768