<prompt> What will be the staging of a squamous cell carcinoma if it T3N2Mo?Stage IIStage IIIStage IVStage I  <response>: Squamous cell carcinoma is classified as stage IV when:i. Regional nodal metastases are N2 or N3 .N2 , node is more than 3 cm but less than 6 cm. It may be a single ipsilateral node, contralateral node or one node in a group of nodes. N3 means node size is longer than 6 cm.ii. When primary growth is T4 with or without nodal metastases.iii. When distant metastases are present with any T. 