Pathologic Stage I Oropharyngeal (HPV-Associated) Carcinoma AJCC v9

**Semantic type:** Neoplastic Process

**Definition:** Stage I includes: (T0, N1, M0); (T1-T2, N0-N1, M0). T0: No evidence of primary tumor. T1: Tumor equal to or less than 2 cm in greatest dimension. T2: Tumor measuring more than 2 cm but equal to or less than 4 cm in greatest dimension. N0: No tumor involvement of regional lymph nodes. N1: Tumor involvement of 1-4 lymph nodes without definitive pathological extranodal extension. M0: No distant metastasis. (AJCC 9th ed.)

**Synonyms:** - Pathologic Stage I Oropharyngeal (HPV-Associated) Cancer AJCC v9 - Pathologic Stage I Oropharyngeal (HPV-Associated) Squamous Cell Carcinoma AJCC v9