A patient has carcinoma of right tongue on its lateral border of anterior 2/3 rd, with lymph node of size 4 cm in level 3 on left side of the neck, stage of disease is:: (A) N0, (B) N1, (C) N2, (D) N3
Answer is C. Since this patient's cancer has spread to ipsilateral lymph node and is greater than 3cm in size he falls under stage 2a of cancer of oral cavity. N0: There is no evidence of regional metastasis N1: Metastasis occur to a single ipsilateral lymph node, 3 cm or less in greatest dimension N2a: Metastasis in single ipsilateral lymph node, >3 cm and N2b: Metastasis occur in multiple ipsilateral lymph nodes, all nodes N2c: Metastasis occur in bilateral or contralateral lymph nodes, all nodes