Negative Prognostic Impact of Smoking on Long-term Survival in Patients With Nasopharyngeal Carcinoma Treated With Curative (Chemo)radiotherapy.

BACKGROUND/AIM: To evaluate the effectiveness of curative (chemo)radiotherapy in patients with nasopharyngeal carcinoma and to identify prognostic factors influencing treatment outcomes. PATIENTS AND METHODS: We conducted a retrospective study of 73 consecutive patients, treated with definitive (chemo)radiotherapy from 2002 to 2019 (median stage III/IV 78%). The median total dose of radiotherapy achieved was 70 Gy. Concomitant chemotherapy was given to 82% of patients. RESULTS: The five- and ten-year locoregional controls were 73% and 72%, respectively; the five- and ten-year distant controls were 93% and 93%, respectively. The five- and ten-year overall survival rates were 46% and 34%, respectively. A multivariate analysis identified age, smoking, and the initial response to treatment as the strongest prognostic factors in predicting survival. CONCLUSION: Smoking ≤5 years before starting curative (chemo)radiotherapy for nasopharyngeal carcinoma was shown to be an independent negative prognostic factor for overall survival with a four-fold higher risk of death compared to non-smokers.

Comedication with corticosteroids and nonsteroidal antiphlogistics does not affect PD-L1 expression in non-small cell lung cancer.

Background: Programmed death-ligand 1 (PD-L1) expression is a standard predictor in the selection of immunotherapy for locally advanced/advanced non-small cell lung cancer (NSCLC). However, comedication with corticosteroids or non-steroidal anti-inflammatory drugs (NSAIDs) may influence the effectiveness of this treatment as documented in several previous studies. Due to certain molecular linkages between PD-L1 and corticosteroids or NSAIDs, we therefore addressed the question of whether there is a relationship between PD-L1 expression in NSCLC and the use of this comedication. Methods: This is a retrospective study using the Czech tumor registry LUng CAncer focuS (LUCAS), from which patient data were drawn. Independence of two categorical parameters was tested by Pearson's chi-square test. Results: In our group of 1,148 patients, we observed no significant relationship between PD-L1 expression and the use of corticosteroids or NSAIDs. Conclusions: According to our data, treatment with corticosteroids or NSAIDs during biopsy does not affect the expression of PD-L1 and it is therefore not necessary to take this treatment into account in this regard.

Worse Prognosis in the Symptomatic Patients With Lung Cancer - Czech Multicentric Study.

Background/Aim: This study aimed at contributing to a better diagnosis of lung cancer by analyzing the patient's symptoms and their linkage to other characteristics. Patients and Methods: We analyzed the data of 3,322 patients from LUCAS (LUngCAncerfocuS) National Registry of the Czech Republic. Overall survival was assessed using the Kaplan-Meier method. Results: The most common symptoms were cough (47.5%), dyspnea (45.6%), pain (27.3%), and weight loss (25.7%). Among all patients, 16% were asymptomatic. We demonstrated the negative prognostic significance of increasing number of lung cancer symptoms, that was significant after adjustment for age, TNM stages, and performance status, and morphological types of the cancer. Conclusion: Monitoring the severity and type of symptoms in patients with lung cancer can help in the diagnostics of the disease and the estimation of prognosis.

Laboratory Parameters Associated With Inflammation Do Not Affect PD-L1 Expression in Non-small Cell Lung Cancer.

BACKGROUND/AIM: Due to some interconnectedness at the molecular level, this study assessed the possible influence of laboratory parameters associated with systemic inflammatory environment on programmed death-ligand 1 (PD-L1) expression in non-small cell lung carcinoma (NSCLC). PATIENTS AND METHODS: We assessed effects of c-reactive protein (CRP), albumin, haemoglobin, neutrophil, and lymphocyte levels on PD-L1 expression in NSCLC. Patient data were obtained retrospectively from LUCAS, the Czech registry of patients with lung carcinomas. Correlations of two continuous parameters (PD-L1 expression and laboratory parameters) were analysed by correlation coefficient. Differences in continuous parameters between two or more groups were tested by Mann-Whitney or Kruskal-Wallis tests. Independence of two categorical parameters was tested by chi-square test. RESULTS: We demonstrated no influence of the investigated laboratory parameters on PD-L1 expression in NSCLC, either in continuous or categorical division of variables. CONCLUSION: Inflammatory laboratory parameters at time of NSCLC diagnosis are unlikely to affect the determination of PD-L1 expression.

Lung Cancer in Non-smokers in Czech Republic: Data from LUCAS Lung Cancer Clinical Registry.

BACKGROUND/AIM: LUCAS is a clinical lung cancer registry (ClinicalTrials.gov identifier is NCT04228237), prospectively collecting data from newly diagnosed lung cancer patients in seven pneumooncology centers in the Czech Republic, since June 1, 2018. The aim of the study was to assess the stage of the disease at the time of diagnosis, percentage of morphological types, survival, percentage of driving mutations, eligibility for radical surgery, and percentage of patients who undergo radical surgery, in the non-smoking population in comparison with smokers and former smokers. PATIENTS AND METHODS: The total number of patients in the registry at the time of the analysis was 2,743. Only 2,439 patients with complete records (smoking status, stage, and type of tumor) were included in this study. RESULTS: The analysis indicated that non-smokers are diagnosed at a later stage of the disease but they have a better survival rate than smokers. Fewer smokers with stage III disease who are eligible for radical surgery will undergo surgery compared to non-smokers with the same clinical stage. Driving mutations are more common in non-smokers, even after adjustment for the more frequent occurrence of adenocarcinoma in the group of non-smokers. CONCLUSION: The data from LUCAS registry are consistent with already known facts, suggesting that the LUCAS registry is a useful clinical tool.

Comparison of Chemotherapeutic Regimens Frequently Used in Metastatic Non-squamous NSCLC Treatment.

BACKGROUND/AIM: Platinum-based chemotherapy with pemetrexed or paclitaxel/bevacizumab are regimens used in combination with checkpoint inhibitors in non-squamous non-small cell lung cancer (NSCLC) treatment. We conducted a real-world study to compare the outcomes of these chemotherapeutic regimens. PATIENTS AND METHODS: We investigated 1,534 patients with advanced non-squamous NSCLC treated with platin/pemetrexed (n=1212) or platin/paclitaxel/bevacizumab (n=322) in 9 cancer centres in the Czech Republic. RESULTS: The regimen containing platin/paclitaxel/bevacizumab showed significantly better overall response rate (ORR) compared to the platin/pemetrexed [40.8% vs. 32.7% (p=0.008)] in the overall population and [55.0% vs. 38.8% (p=0.002)] in the Eastern Cooperative Oncology Group performance status 0 group. There was no significant improvement in progression-free survival (PFS) and overall survival (OS) in either of these two groups of patients. CONCLUSION: In our real-world data analysis, patients treated with platin/paclitaxel/bevacizumab had better overall response rate (ORR), but not PFS or OS. Thus, both treatment regimens are similarly effective. Their selection should therefore be based on the potential side effects.

Impact of Concomitant Medication Administered at the Time of Initiation of Nivolumab Therapy on Outcome in Non-small Cell Lung Cancer.

AIM: To investigate potential association between administration of corticosteroids, antibiotics, probiotics, proton pump inhibitors, non-steroidal anti-inflammatory drugs (NSAID), statins and metformin and outcome in patients with non-small cell lung cancer (NSCLC) treated with nivolumab. PATIENTS AND METHODS: A total of 224 patients with advanced NSCLC treated at nine comprehensive cancer centers were analyzed in this national retrospective study. Survival statistics were evaluated using Kaplan-Meier method and Cox analysis. RESULTS: Only corticosteroid use had a significant negative effect on the objective response rate. In the univariate analysis, there was no significant effect of the studied concomitant medications on the efficacy of nivolumab. In a subsequent multifactorial analysis, a possible positive effect of the concomitant use of NSAID at the initiation of nivolumab treatment was revealed. CONCLUSION: The results of the present retrospective exploratory analysis underscore the importance of knowing the exact type of concomitant medication, the route of administration, the dose of medication, and the region of the ongoing study. The present data indicated a significantly higher rate of progression in patients treated with corticosteroids and the possible positive effect of NSAID use at the initiation of nivolumab treatment.