Background: The American Joint Committee on Cancer (AJCC) has changed the staging system of oral squamous cell carcinoma (OSCC) in the 8th edition of its staging manual to include depth of invasion (DOI) of the primary tumor as a modifier to the T category and extranodal extension (ENE) to upstage node positive OSCC. This study aims to evaluate the performance of the AJCC 8 pathologic staging system in OSCC and compare it to its predecessor (AJCC 7).
Methods: Analysis of 663 patients with OSCC from a prospective database was performed using the Cox proportional hazards competing risk model.
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