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Τρίτη 26 Ιανουαρίου 2021

Redefining risk of contralateral cervical nodal disease in early stage oropharyngeal cancer in the human papillomavirus era

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Abstract

Background

The optimal extent of surgery and/or radiation to the contralateral lymph node region is unknown in early‐stage human papillomavirus (HPV)–related oropharyngeal squamous cell carcinoma (OPSCC).

Methods

To investigate the pathologic incidence of and risk factors for contralateral nodal disease (CND) in cT1‐T2 HPV‐related OPSCC treated with transoral robotic surgery (TORS) and bilateral neck dissection (BND), the records of 120 patients were reviewed.

Results

Eleven patients displayed pathologic contralateral nodal disease (pCND), including 7.1% of tonsil and 10.9% of base of tongue (BOT) cases. Medial hemistructure involvement and cN2 disease were significantly associated with pCND. Zero cN0 patients had pCND, and on multivariate analysis only cN classification remained significantly associated with pCND. Four percent of BOT patients and 2% of tonsil patients with a well‐lateralized primary and cN0/N1 neck demonstrated pCND.

Conclusions

HPV‐related OPSCC that are cN0‐N1 have exceedingly low rates of pCND. Well‐lateralized HPV‐related BOT primaries with limited clinical nodal disease may be candidates for ipsilateral only treatment.

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