Conservative laser microsurgery for T1 glottic carcinoma.

OBJECTIVE

The purpose of the study was to assess whether partial cordectomy or complete cordectomy with narrow free margins is a safe oncological procedure for T1 glottic carcinoma. We also studied surgical margins and the involvement of anterior commissure.

METHODS

Thirty-one T1 glottic carcinomas underwent endoscopic CO(2) laser excision of the lesion based on the depth of infiltration by the tumor with 1-2mm free margins. If detecting free margins was not macroscopically possible, additional biopsies along all the uncertain margins of the excision's residual area were taken. After excision, the specimen was mounted on a plastic support, flattened and then held in place with fine needles. It was then oriented and mapped. The pathologist measured the lesion's point of maximum infiltration and its distance from the free margins.

RESULTS

Local and ultimate control at 36 months was 95% and 100%, respectively. We performed 29 partial and two complete cordectomies. Complete resection of the lesion was obtained in 90.4% of the cases. Re-resection was necessary in 9.6% of the cases due to positive margins. The anterior commissure was affected in 38.7% of the cases, and was the site of maximum infiltration in 9.6% of the cases. The mean maximum infiltration was 0.93mm in the anterior commissure, 2.18mm in the anterior 1/3rd of the vocal cord, 1.71mm in the middle 1/3rd of the vocal cord and 1.5mm in the posterior 1/3rd of the vocal cord. In 83.9% of the cases (p<0.01), the anterior 1/3rd of the vocal cord was the section most frequently involved. In 19 patients (61.3%) (p<0.01), the anterior 1/3rd of the vocal cord was also the area with the highest incidence of maximum infiltration by the tumor.

CONCLUSION

We concluded that.