Abstract
Objective
Laryngeal stroboscopy is an important diagnostic tool in the work-up of patients with phoniatric complaints. The aim of this article is to evaluate the diagnostic value of laryngeal stroboscopy in excluding glottic carcinoma in patients with suspected glottic carcinoma.
Data sources
PubMed, Embase, and the Cochrane Library.
Review methods
A systematic literature search was performed in PubMed, Embase, and the Cochrane Library. Studies reporting original study data were included. Studies were selected based on predefined inclusion and exclusion criteria and were consequently systematically assessed for their relevance and risk of bias. Studies with low relevance, high risk of bias or both were excluded from analysis. The prevalences, sensitivities, specificities, and post-test probabilities of laryngeal stroboscopy for detecting glottic carcinoma were extracted or calculated with data supplied in the article.
Results
Seven studies, with high relevance and moderate risk of bias, were selected for data extraction. The baseline risk of glottic carcinoma was 25% to 49% in the included studies. Sensitivity ranged between 80% and 100% and specificity between 25% and 100%. Post-test probabilities of malignancy in case of an abnormal stroboscopy ranged between 35% and 100%. Post-test probabilities of malignancy in case of a normal stroboscopy ranged between 0% and 29%.
Conclusion
A normal laryngeal stroboscopic result predicts the absence of invasive carcinoma. Laryngeal stroboscopy can therefore be suggested as a useful supplemental examination in the standard diagnostic work-up for all patients with suspected glottic carcinoma.
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