CC BY 4.0 · Brazilian Journal of Oncology 2022; 18: e-20220350
DOI: 10.5935/2526-8732.20220350
Original Article
Clinical Oncology

Is platelet-lymphocyte ratio (PLR) a predictor of thrombosis and together with circulating tumor cells capable to determine recurrence-free survival in patients with gastric cancer?

A razão plaqueta-linfócito (PLR) é um preditor de trombose e, juntamente com as células tumorais circulantes, é capaz de determinar a sobrevida livre de recorrência em pacientes com câncer gástrico?
Bruno Soriano Pignataro
1   Departament of Vascular and Endovascular Surgery, A.C. Camargo Cancer Center, Brazil
,
Emne Ali Abdallah
2   IQVIA, São Paulo, Brazil
,
Celso Abdon Lopes Mello
3   Department of Medical Oncology, A.C. Camargo Cancer Center, São Paulo, Brazil
,
Vinicius Fernando Calsavara
4   Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
,
Kenji Nishinari
1   Departament of Vascular and Endovascular Surgery, A.C. Camargo Cancer Center, Brazil
,
3   Department of Medical Oncology, A.C. Camargo Cancer Center, São Paulo, Brazil
,
Marcello F Fanelli
5   Oncologia Clínica da Rede São Camilo, São Paulo, Brazil
,
Guilherme Yazbek
1   Departament of Vascular and Endovascular Surgery, A.C. Camargo Cancer Center, Brazil
,
Ludmilla Thomé Domingos Chinen
6   Núcleo de Ensino e Pesquisa da Rede São Camilo, São Paulo, Brazil
› Author Affiliations
Financial support: None to declare.

ABSTRACT

Introduction: Cancer-associated thrombosis (CAT) is a major cause of morbidity and mortality in oncology patients. There are no accurate risk assessment tools to predict venous thromboembolism (VTE). Circulating tumor cells (CTCs), circulating tumor microemboli (CTM), and high platelet-lymphocyte ratio (PLR) may predispose to VTE.

Objective: To evaluate correlations of CTCs, CTM, and PLR with VTE and recurrence-free survival (RFS) in gastric cancer patients.

Material and Methods: Patients with gastric cancer (localized and metastatic disease) were recruited (March 2016 to April 2017). CTCs were analysed by ISET at two timepoints: before neoadjuvant treatment (CTC1) and after surgery/before adjuvant therapy (CTC2) for patients with localized disease, and before first-line chemotherapy (CTC1) and after 6 months (CTC2) for patients with metastases. VTE incidence was determined retrospectively. RFS was estimated by Kaplan-Meier analysis.

Results: We evaluated 93 patients. According to Khorana scores, 63 (67.7%) patients were at intermediate and 30 (32.3%) were at high risk for VTE. VTE incidence was 20.4% and CTM were found in 39.8%. VTE developed in 7/37 (18.9%) CTM-positive and in 11/50 (22%) CTM-negative patients (p=0.93). When PLR >288, VTE occurred in 7/14 patients (p=0.005). PLR also associated with poor RFS (p<0.0001). CTC2 was associated with poor RFS (p<0.0001). CTC2, PLR and VTE were independent prognostic factors for RFS (p=0.005, 0.043, and <0.0001, respectively).

Conclusion: PLR is a prognostic indicator for VTE and RFS in gastric cancer patients. Neither CTC, nor CTM improved risk stratification for VTE in our studied population. PLR, CTC2, and VTE were independent prognostic factors for RFS.

RESUMO

Introdução: A trombose associada ao câncer (TAC) é uma das principais causas de morbidade e mortalidade em pacientes oncológicos. Não existem ferramentas de avaliação de risco precisas para prever tromboembolismo venoso (TEV). Células tumorais circulantes (CTCs), microêmbolos tumorais circulantes (MTC) e alta relação plaquetas-linfócitos (RPL) podem predispor ao TEV.

Objetivo: Avaliar as correlações de CTCs, MTC e RPL com TEV e sobrevida livre de recorrência (SLR) em pacientes com câncer gástrico.

Material e Métodos: Foram recrutados pacientes com câncer gástrico (doença localizada e metastática) (março de 2016 a abril de 2017). As CTCs foram analisadas pelo ISET em dois momentos: antes do tratamento neoadjuvante (CTC1) e após a cirurgia/antes da terapia adjuvante (CTC2) para pacientes com doença localizada, e antes da quimioterapia de primeira linha (CTC1) e após 6 meses (CTC2) para pacientes com metástases. A incidência de TEV foi determinada retrospectivamente. A SLR foi estimada pela análise de Kaplan-Meier.

Resultados: Avaliamos 93 pacientes. De acordo com os escores de Khorana, 63 (67,7%) pacientes estavam no nível intermediário e 30 (32,3%) estavam em alto risco para TEV. A incidência de TEV foi de 20,4% e MTC foram encontrados em 39,8%. TEV desenvolveu-se em 7/37 (18,9%) pacientes MTC-positivos e em 11/50 (22%) pacientes MTC-negativos (p=0,93). Quando RPL >288, ocorreu TEV em 7/14 pacientes (p=0,005). A RPL também associou-se à baixa SLR (p<0,0001). CTC2 foi associado com SLR ruim (p<0,0001). CTC2, RPL e TEV foram fatores prognósticos independentes para SLR (p=0,005, 0,043 e <0,0001, respectivamente).

Conclusão: RPL é um indicador prognóstico para TEV e SLR em pacientes com câncer gástrico. Nem CTC, nem MTC melhoraram a estratificação de risco para TEV em nossa população estudada. RPL, CTC2 e TEV foram fatores prognósticos independentes para SLR.

ETHICAL APPROVAL AND CONSENT TO PARTICIPATE

Approved by the ethics committee: (CEP 2134/15).


AUTHORS' CONTRIBUTIONS

B.S.P: data analysis and interpretation, manuscript writing; E.A.A: data analysis and interpretation, collection and/or assembly of data; C.A.L.M: conception/design, data analysis and interpretation; V.F.C: statistical analysis; K.N.: data analysis and interpretation; A.P.C.R.: collection and/or assembly of data; M.F.F.: interpretation and manuscript writing; G.Y: data analysis and interpretation, final approval of manuscript; L.T.D.C: conception/design, data analysis and interpretation, manuscript writing, final approval of manuscript.


CONFLICTS OF INTEREST

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.




Publication History

Received: 04 May 2022

Accepted: 01 July 2022

Article published online:
25 July 2022

© 2022. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution 4.0 International License, permitting copying and reproduction so long as the original work is given appropriate credit (https://creativecommons.org/licenses/by/4.0/)

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Bibliographical Record
Bruno Soriano Pignataro, Emne Ali Abdallah, Celso Abdon Lopes Mello, Vinicius Fernando Calsavara, Kenji Nishinari, Anna Paula Carreta Ruano, Marcello F Fanelli, Guilherme Yazbek, Ludmilla Thomé Domingos Chinen. Is platelet-lymphocyte ratio (PLR) a predictor of thrombosis and together with circulating tumor cells capable to determine recurrence-free survival in patients with gastric cancer?. Brazilian Journal of Oncology 2022; 18: e-20220350.
DOI: 10.5935/2526-8732.20220350
 
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