<prompt> Mr. Ramu 30 years old male with papillary carcinoma in thyroid with a nodule 3 cm confined to neck with 2 lymph node palpable in neck along with lung micro-metastasis. How will you stage this according to AJCC 8th edition?IIIIIIIV  <response>: Age 55 years, any T, any N, M0 - stage 1 Any T, any N, M 1 - stage 2 Primary tumor T Tx Primary tumor cannot be assessed T0 No evidence of primary tumor T1 Tumor 2cm in greatest dimension limited to the thyroid T1a Tumor 1 cm in greatest dimension limited to the thyroid T1b Tumor 1cm but 2 cm in greatest dimension limited to the thyroid T2 Tumor 2cm but 4 cm in greatest dimension limited to the thyroid T3 Tumor 4 cm limited to the thyroid, or gross extrathyroidal extension invading only strap muscles T3a Tumor 4cm limited to the thyroid T3b Gross extrathyroidal extension invading only strap muscles sternohyoid, sternothyroid, thyrohyoid or omohyoid muscles from a tumor of any size T4 Includes gross extrathyroidal extension beyond the strap muscles T4a Gross extrathyroidal extension invading subcutaneous soft tissues, larynx, trachea, esophagus, or recurrent laryngeal nerve from a tumor of any size T4b Gross extrathyroidal extension invading preveebral or encasing the aery or mediastinal Vessels from a tumor of any size Regional lymph nodes N NX Regional lymph nodes cannot be assessed N0 No evidence of locoregional lymph node metastasis N0a One or more cytologically or histologically confirmed benign lymph nodes N0b No radiologic or clinical evidence of locoregional lymph node metastasis N1 Metastasis to regional nodes N1a Metastasis to level VI or VII pretracheal, paratracheal, or prelaryngeal Delphian, or upper Mediastinal lymph nodes. This can be unilateral or bilateral disease. N1b Metastasis to unilateral, bilateral, or contralateral lateral neck lymph levels I, II, III, IV, or V or retropharyngeal lymph nodes Distant Metastasis M M0 No distant metastasis M1 Distant metastasis 