Impact of Resection Margin Status and Revision Transoral Laser Microsurgery in Early Glottic Cancer: Analysis of Organ Preservation and Local Disease Control on a Cohort of 153 Patients

Overview

Journal Braz J Otorhinolaryngol

Specialty Otorhinolaryngology

Date 2020 Dec 4

PMID 33272837

Citations 7

Authors

Carmelo Saraniti

Francesca Montana

Enzo Chianetta

Giuseppe Greco

Barbara Verro

Affiliations

Soon will be listed here.

Abstract

Introduction: Transoral laser microsurgery represents the treatment of choice for early glottic cancer. Its use and effectiveness are mainly related to laryngeal exposure and deep extension of tumor. Histopathologic assessment of surgical margin presents a main issue about transoral laser microsurgery and complete oncological excision.

Objective: The aim was to analyze the impact of revision surgery on organ preservation and local disease control in patients with early glottic cancer treated by transoral laser microsurgery.

Methods: We carried out a retrospective study on a cohort of 153 patients with early glottic cancer (Tis, T1, T2) treated by transoral laser microsurgery. Resection margins were classified as follows: "free" if macroscopic margin-tumor distance was at least 2mm, as "close" if it was less than 2mm and "positive" if the margin was involved by carcinoma. Patients were divided into two groups: patients with free resection margins (Group A) and patients with positive, close or not-evaluable resection margins (Group B). Group A (36) underwent periodic followup. Group B (117) underwent a second look laser CO 2 months after surgery. Fifteen patients of Group A with suspected persistence of carcinoma during followup underwent a second laser resection after a time interval of 4-8 months after first surgery. Overall survival, disease-free survival, disease-specific survival, ultimate local control with laser alone and organ preservation rates were estimated.

Results: Five-year overall survival rate and 5-year disease-specific survival were 100% in both groups. The five-year laryngeal preservation rate was 100% in Group A and 95.2% in Group B. Five-year disease-free survival was 92.15% and 5-year ultimate local control with laser alone in 92.15% of patients.

Conclusion: This study has demonstrated that revision Transoral Laser Microsurgery is able to confirm the oncological radicality in most cases, even in the case of positive, close or non-evaluable margins. Considering our results, according to our experience, the second look with CO laser is a therapeutic strategy to consider, even in the case of close or non-evaluable as well as positive margins.

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