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Karagol C, Tehci AK, Gungor A, Ekici Tekin Z, Çelikel E, Aydın F, Kurt T, Sezer M, Tekgöz N, Coşkun S, Kaplan MM, Bayhan GI, Yaralı HN, Ozbek NY, Çelikel Acar B. Delta neutrophil index and C-reactive protein: a potential diagnostic marker of multisystem inflammatory syndrome in children (MIS-C) with COVID-19. Eur J Pediatr 2022; 181:775-781. [PMID: 34647164 PMCID: PMC8514280 DOI: 10.1007/s00431-021-04281-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 09/02/2021] [Accepted: 10/03/2021] [Indexed: 12/19/2022]
Abstract
Multisystem inflammatory syndrome in children (MIS-C) is a life-threatening hyperinflammation syndrome emerging after COVID-19. The serum delta neutrophil index (DNI) reflects the fraction of circulating immature granulocytes and is evaluated in infection and inflammation. The aim of this study is to evaluate the usefulness of DNI as a diagnostic marker in patients with MIS-C and to assess its role in determining the severity of MIS-C. This retrospective, observational study included 83 patients with MIS-C and 113 patients with COVID-19, and 102 healthy controls. C-reactive protein (CRP), the absolute neutrophil count (ANC), absolute lymphocyte count (ALC), DNI, and the platelet count were recorded. The DNI levels were 4.60 ± 5.70% in the MIS C group, 0.30 ± 0.99% in the COVID group, and 0.20 ± 0.56% in the control group (p < 0.001). According to the severity of MIS-C, the DNI level was found to be 1.22% in mild MIS-C, 4.3% in moderate MIS-C, and 5.7% in severe MIS-C. There was a statistically significant correlation between DNI levels and the severity of MIS-C. The cutoff value of DNI for predicting MIS-C was 0.45%. In the analysis of the diagnostic performance of DNI compared with CRP, ANC, ALC and platelet counts, sensitivity, specificity, positive predictive value, and negative predictive value were found to be 79.5%, 97.1%, 95.7%, and 85.3%, respectively.Conclusions: The delta neutrophil index was identified as a diagnostic marker for MIS-C such as ANC, ALC, platelet count, and CRP. DNI levels in hemogram analysis may guide clinicians in determining the diagnosis and severity of MIS-C. What is Known: • Although CRP, sedimentation, ALC, ANC, platelet count, sodium, and albumin are used as first step tests, there is no specific laboratory marker used in the diagnosis of MIS C. • The serum delta neutrophil index (DNI) reflects the fraction of circulating immature granulocytes and is elevated in infection and inflammation. What is New: • DNI is a promising and easily accessible marker that can be used with other markers in the diagnosis and determines the severity of MIS C. • DNI is an easily accessible, inexpensive, and dynamic marker and its levels in simple hemogram analysis will guide pediatricians in determining the diagnosis and severity in MIS C.
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Affiliation(s)
- Cuneyt Karagol
- Division of Pediatric Rheumatology, Department of Pediatrics, University of Health Sciences, Ankara City Hospital, 06800-Bilkent, Ankara, Turkey
| | - Ali Kansu Tehci
- Department of Pediatric Emergency Medicine, Dr. Sami Ulus Maternity and Child Health and Diseases Training and Research Hospital, Ankara, Turkey
| | - Ali Gungor
- Department of Pediatric Emergency Medicine, Dr. Sami Ulus Maternity and Child Health and Diseases Training and Research Hospital, Ankara, Turkey
| | - Zahide Ekici Tekin
- Division of Pediatric Rheumatology, Department of Pediatrics, University of Health Sciences, Ankara City Hospital, 06800-Bilkent, Ankara, Turkey
| | - Elif Çelikel
- Division of Pediatric Rheumatology, Department of Pediatrics, University of Health Sciences, Ankara City Hospital, 06800-Bilkent, Ankara, Turkey
| | - Fatma Aydın
- Division of Pediatric Rheumatology, Department of Pediatrics, University of Health Sciences, Ankara City Hospital, 06800-Bilkent, Ankara, Turkey
| | - Tuba Kurt
- Division of Pediatric Rheumatology, Department of Pediatrics, University of Health Sciences, Ankara City Hospital, 06800-Bilkent, Ankara, Turkey
| | - Müge Sezer
- Division of Pediatric Rheumatology, Department of Pediatrics, University of Health Sciences, Ankara City Hospital, 06800-Bilkent, Ankara, Turkey
| | - Nilüfer Tekgöz
- Division of Pediatric Rheumatology, Department of Pediatrics, University of Health Sciences, Ankara City Hospital, 06800-Bilkent, Ankara, Turkey
| | - Serkan Coşkun
- Division of Pediatric Rheumatology, Department of Pediatrics, University of Health Sciences, Ankara City Hospital, 06800-Bilkent, Ankara, Turkey
| | - Melike Mehveş Kaplan
- Division of Pediatric Rheumatology, Department of Pediatrics, University of Health Sciences, Ankara City Hospital, 06800-Bilkent, Ankara, Turkey
| | - Gulsum Iclal Bayhan
- Division of Pediatric Infectious Disease, Department of Pediatrics, University of Health Sciences, Ankara City Hospital, 06800-Bilkent, Ankara, Turkey
| | - Husniye Nese Yaralı
- Division of Pediatric Hematology, Department of Pediatrics, University of Health Sciences, Ankara City Hospital, 06800-Bilkent, Ankara, Turkey
| | - Namuk Yasar Ozbek
- Division of Pediatric Hematology, Department of Pediatrics, University of Health Sciences, Ankara City Hospital, 06800-Bilkent, Ankara, Turkey
| | - Banu Çelikel Acar
- Division of Pediatric Rheumatology, Department of Pediatrics, University of Health Sciences, Ankara City Hospital, 06800-Bilkent, Ankara, Turkey
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