Outcome Comparison of KTP laser and CO2 laser excision for Laryngeal papillomatosis -- A Systematic Review

Background: CO2 laser and the 532-nm potassium titanyl phosphate laser (KTP) were developed to treat Laryngeal papillomatosis (LP); however, the difference in their outcomes remains unclear. Methods: A systematic review was conducted through a comprehensive search of three databases. Results: Overall, the cure rates were 87.25% in the KTP group and 75.98% in the CO2 group (p＜0.05). The complications rates were significantly different between the two groups (p<0.0001). In addition, there was no significant difference between the recurrence rates of the CO2 group and the KTP group (10% vs 9.8%). The risks of bias were 13.1±1.45 and 13.6±1.52 for CO2 group and KTP group respectively, which indicated the fair quality of evidence. Conclusions: The available fair-quality evidence suggested that KTP laser excision may be a better choice for LP. Following evaluations on the benefits of the two surgical techniques with more high-quality randomized controlled studies are needed.