Beyond the boundaries of compartmental hemiglossectomy: a proposal for an anatomically based classification of surgical approaches to advanced oral tongue squamous cell carcinoma

Introduction: In the last decade, compartmental surgery (CTS) has been the surgical approach of choice for advanced tumors of the tongue and oral floor. Methods: Advanced tumors (cT3–T4) oral tongue squamous cell carcinoma (OTSCC) may extend beyond the lingual septum and involve the contralateral hemitongue, developing along the intrinsic transverse muscle. The disease may then involve the genioglossus muscle and, more laterally, the hyoglossus muscle. Results: The surgical approach to the contralateral tongue must be guided by anatomic and anatomopathological principles to achieve a safe oncological resection based on the principles of CTS. Conclusion: We propose a schematic classification of glossectomies that extend to the contralateral hemitongue based on the anatomy and pathways of tumor spread.