A 50-year-old lady with thyroid swelling is diagnosed to have papillary carcinoma with mass having 4 cm at greatest diameter and invading strap muscles. Lymph node status was negative. What will be the stage of the disease?

Extrathyroidal extension into strap muscles is T3b, Lymph node status is N0.Patients with below 55 years any T and any N with Mo (no metastasis) is taken as Stage IIf patient was above or 55 years age, would have been stage IIT1<2cmT2 2-4 cmT3a > 4cmT3bExtrathyroidal extension into strap musclesT4Gross extrathyroidal extension*This was recent update in AJCC 8th classification, previously cut off age was 45 yearsRef: AJCC 8th edition