Abstract
The Systemic Immune-inflammation Index (SII) is a new biomarker based on the number of neutrophils, platelets, and lymphocytes in the Complete blood count, and is shown as diagnostic and prognostic in many diseases. Mucosal or Squamous COM differentiation is necessary preoperatively in chronic otitis media patients. The purpose of this study was to test the predictive value of inflammation markers to predict the differentiation of Mucosal COM and Squamous COM. Our aim is; using "SII" as a powerful test to differentiate cholesteatoma and active mucosal middle ear disease. In the present study, 300 patients who underwent mastoidectomy ± tympanoplasty between 2010 and 2020 were retrospectively evaluated. The patients were divided into two equal groups as clinical, microscopically, and pathologically Squamosal COM (Cholesteatoma) and Mucosal COM (Suppurative) (n = 150). Routine hemogram tests were performed for both groups. White blood cell, red blood cell, neutrophil, lymphocyte, and platelet numbers were calculated. The SII value was calculated manually according to the formula of "neutrophil × platelet/lymphocyte. There were a total of 300 patients who were aged 20–63 in both groups. A total of 130 of these patients were male (43%), and 170 (57%) were female. In terms of NLR and PLR, Group 2 (Mucosal COM) had higher values at statistically significant levels (p < 0.001, p < 0.001, respectively). In terms of SII, Group 2 (Mucosal COM) had higher values at statistically significant levels (p < 0.001). According to the results of the ROC Analysis in our series, it was found that NLR, PLR, and SII values were above the acceptable level, and were statistically significant (p < 0.001, p < 0.001, p < 0.001, respectively). The cut-off value of SII was 470.29, sensitivity was 65.8, and specificity was 34. According to our study, hig h SII values in COM differentiation are very important in diagnosing Mucosal COM. SII values can help to the diagnosis in Squamous COM/Mucosal COM differentiation. There is no current practical, inexpensive, and widespread laboratory test used in the Mucosal/Squamous COM differentiation. SII can be diagnostic, and determine the treatment in this differentiation. A great number of studies are needed for SII values to become standard in COM.
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