SummaryPurpose. The aim of the study was to evaluate serum concentrations of total sialic acids (TSA) in patients with squamous cell carcinoma of the larynx preoperatively and 4 years postoperatively and to compare the results with the serum concentration of sialic acids in patients with non-neoplastic laryngeal lesions.
Methods: The study comprised 52 patients with squamous cell carcinoma of the larynx and 25 patients with non-neoplastic laryngeal lesions. Serum TSA concentrations were assessed in all patients preoperatively. Four years after surgery, serum TSA concentrations were assessed again in 21 patients from the study group in whom recurrence was not detected.
Results: Significantly higher serum concentrations of TSA were found in patients with laryngeal cancer compared to the control group (p< 0.0000001). Changes in TSA concentrations in the study group depended only on cancer grade (G). Significantly higher TSA concentrations were found in G3 patients. Such a relationship was not found for other parameters assessed. Alcohol consumption was the only important factor that affected TSA concentration in the control group. Significantly higher TSA concentrations were found in patients who admitted alcohol abuse. Significantly lower TSA concentrations were observed in patients with laryngeal cancer who were assessed 4 years postoperatively (p < 0.000106).
Conclusion: Serum concentration of TSA was increased significantly in laryngeal cancer and decreased significantly after several years of successful treatment. Further studies are warranted to assess the possibility of using sialic acids as a marker or target for immunotherapy.
Key words: sialic acids, squamous cell carcinoma of the larynx, markers in laryngeal cancer, N-acetyl-5-neuraminic acid.
Keywords: N-acetyl-5-neuraminic acid; markers in laryngeal cancer; sialic acids; squamous cell carcinoma of the larynx.