Tuesday, November 30, 2021

Achieving negative resection margins in oral cavity cancer with masticator space involvement—Is it feasible? An international collaborative study

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Abstract

Background

Masticator space involvement in oral cavity squamous cell carcinoma (OCSCC) is considered an unresectable disease. Nevertheless, achieving negative resection margins is feasible in limited masticatory space involvement.

Materials and Methods

A multi-institutional study on OCSCC patients with masticator space invasion who underwent surgical resection. Margin status was assessed according to anatomic tumor involvement of the inframandibular and supra-mandibular notch.

Results

One-hundred and thirty-two patients met the inclusion criteria. Then, 67 patients (50.8%) were diagnosed with a supra-notch tumor and 65 (49.2%) with an infra-notch disease. Negative margins were more common in the infra-notch group (43.3 vs. 23.1%, p = 0.014), and positive margins were more common in the supra-notch group (41.5 vs. 23.9%, p = 0.041). Multivariable analysis demonstrated that supra-notch tumors had an increased likelihood for involved resection margins (odds ratio = 2.46, p = 0.036).

Conclusion

OCSCC patients with masticator space involvement are prone for positive surgical margins in tumors extending above the supra-mandibular notch.

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