EN
TR
Association of Baseline Neutrophil to Lymphocyte and Platelet to Lymphocyte Ratios with Relapse in Sarcoidosis: A Single Center Retrospective Study
Abstract
Background: Sarcoidosis is a heterogeneous multisystem granulomatous disease characterized by variable clinical course and relapse potential. Current ATS, BTS, and ERS guidance highlights the need for accessible biomarkers that may support clinical assessment and longitudinal follow up. Inflammatory hematologic indices such as neutrophil to lymphocyte ratio (NLR) and platelet to lymphocyte ratio (PLR) have been investigated as potential markers of disease activity in sarcoidosis. This study aimed to evaluate the association of baseline NLR and PLR values with clinical phenotype and relapse in sarcoidosis patients.
Methods: In this single-center retrospective study, adult patients followed with a diagnosis of sarcoidosis between January 2014 and June 2024 were reviewed. Patients with concomitant infection at diagnosis, HIV infection, active malignancy, hematologic disease, coexisting tuberculosis, or missing clinical/laboratory data were excluded. Baseline complete blood count parameters were used to calculate NLR and PLR values. Relapse status during follow-up was recorded, and laboratory parameters at relapse were additionally evaluated in relapsing patients. Group comparisons, ROC analyses, and multivariate logistic regression analyses were performed to evaluate the association between inflammatory indices and relapse.
Results: A total of 198 patients were included, and relapse occurred in 32 patients (16.2%). Patients with relapse had significantly higher baseline NLR (median 2.6 vs 2.1, p=0.003) and PLR (median 208.6 vs 132.3, p<0.001) values compared with non-relapsing patients. In relapsing patients, both NLR and PLR increased significantly during relapse compared with baseline values (NLR 6.7 vs 2.6, p<0.001; PLR 393.6 vs 208.6, p=0.004). ROC analysis demonstrated modest discriminative ability for relapse, with AUC values of 0.669 for NLR and 0.715 for PLR. In multivariate logistic regression analysis, advanced radiological stage (Stage 2–4), higher baseline NLR, and higher baseline PLR were independently associated with relapse.
Conclusions: Baseline and relapse-time NLR and PLR values were significantly elevated in sarcoidosis patients who developed relapse. Among these indices, PLR demonstrated better discriminative performance than NLR. Although these biomarkers should not be considered standalone predictive tools, they may provide supportive information in the clinical assessment and longitudinal monitoring of sarcoidosis patients. Prospective multicenter studies are needed to validate their clinical applicability.
Keywords
Ethical Statement
Approval for the study was granted by the local ethics committee (approval no: 2024-9).
References
- 1.Kable T, DuMontier S, Streiler C. Sarcoidosis: areview of the guidelines and what’s to come.Missouri Medicine. 2024;121(5):373.
- 2.Crouser ED, Maier LA, Wilson KC, et al. Diagnosisand detection of sarcoidosis. An official AmericanThoracic Society clinical practice guideline.American journal of respiratory and critical caremedicine. 2020;201(8):e26-e51.
- 3.Baughman RP, Valeyre D, Korsten P, et al. ERSclinical practice guidelines on treatment ofsarcoidosis. European Respiratory Journal.2021;58(6).
- 4.Thillai M, Atkins CP, Crawshaw A, et al. BTSClinical Statement on pulmonary sarcoidosis.Thorax. 2021;76(1):4-20.
- 5.Li Y, Xu G. Diagnostic value of imaging andserological biomarkers in pulmonary sarcoidosis.Advances in respiratory medicine. 2024;92(3):190-201.
- 6.Alamdari MG, Kalami N, Shojaan H, et al.Systematic review of the diagnostic role ofneutrophil to lymphocyte ratio in sarcoidosis.Sarcoidosis, Vasculitis, and Diffuse Lung Diseases.2023;40(1):e2023008.
- 7.Ozdemirel TS, Özyürek BA, Tatci E, et al.Relationships Between Systemic InflammatoryMarkers and 18F-FDG PET/CT Imaging and Clinical Findings in Pulmonary Sarcoidosis. Cureus. 2023;15(3).
- 8.Korkmaz C, Demircioglu S. The association ofneutrophil/lymphocyte and platelet/lymphocyteratios and hematological parameters with diagnosis, stages, extrapulmonary involvement, pulmonaryhypertension, response to treatment, and prognosisin patients with sarcoidosis. Canadian respiratoryjournal. 2020;2020(1):1696450.
Details
Primary Language
English
Subjects
Health Care Administration, Medical Education, Health Services and Systems (Other)
Journal Section
Research Article
Publication Date
September 11, 2026
Submission Date
January 19, 2026
Acceptance Date
June 17, 2026
Published in Issue
Year 2026 Volume: 53 Number: 3
APA
Tomas, G., Başlılar, Ş., & Düger, M. (2026). Association of Baseline Neutrophil to Lymphocyte and Platelet to Lymphocyte Ratios with Relapse in Sarcoidosis: A Single Center Retrospective Study. Dicle Medical Journal, 53(3), 617-626. https://doi.org/10.5798/dicletip.2036432
AMA
1.Tomas G, Başlılar Ş, Düger M. Association of Baseline Neutrophil to Lymphocyte and Platelet to Lymphocyte Ratios with Relapse in Sarcoidosis: A Single Center Retrospective Study. Dicle Medical Journal. 2026;53(3):617-626. doi:10.5798/dicletip.2036432
Chicago
Tomas, Güzide, Şeyma Başlılar, and Mustafa Düger. 2026. “Association of Baseline Neutrophil to Lymphocyte and Platelet to Lymphocyte Ratios With Relapse in Sarcoidosis: A Single Center Retrospective Study”. Dicle Medical Journal 53 (3): 617-26. https://doi.org/10.5798/dicletip.2036432.
EndNote
Tomas G, Başlılar Ş, Düger M (September 1, 2026) Association of Baseline Neutrophil to Lymphocyte and Platelet to Lymphocyte Ratios with Relapse in Sarcoidosis: A Single Center Retrospective Study. Dicle Medical Journal 53 3 617–626.
IEEE
[1]G. Tomas, Ş. Başlılar, and M. Düger, “Association of Baseline Neutrophil to Lymphocyte and Platelet to Lymphocyte Ratios with Relapse in Sarcoidosis: A Single Center Retrospective Study”, Dicle Medical Journal, vol. 53, no. 3, pp. 617–626, Sept. 2026, doi: 10.5798/dicletip.2036432.
ISNAD
Tomas, Güzide - Başlılar, Şeyma - Düger, Mustafa. “Association of Baseline Neutrophil to Lymphocyte and Platelet to Lymphocyte Ratios With Relapse in Sarcoidosis: A Single Center Retrospective Study”. Dicle Medical Journal 53/3 (September 1, 2026): 617-626. https://doi.org/10.5798/dicletip.2036432.
JAMA
1.Tomas G, Başlılar Ş, Düger M. Association of Baseline Neutrophil to Lymphocyte and Platelet to Lymphocyte Ratios with Relapse in Sarcoidosis: A Single Center Retrospective Study. Dicle Medical Journal. 2026;53:617–626.
MLA
Tomas, Güzide, et al. “Association of Baseline Neutrophil to Lymphocyte and Platelet to Lymphocyte Ratios With Relapse in Sarcoidosis: A Single Center Retrospective Study”. Dicle Medical Journal, vol. 53, no. 3, Sept. 2026, pp. 617-26, doi:10.5798/dicletip.2036432.
Vancouver
1.Güzide Tomas, Şeyma Başlılar, Mustafa Düger. Association of Baseline Neutrophil to Lymphocyte and Platelet to Lymphocyte Ratios with Relapse in Sarcoidosis: A Single Center Retrospective Study. Dicle Medical Journal. 2026 Sep. 1;53(3):617-26. doi:10.5798/dicletip.2036432