5
Patient age < 45 years old at diagnosis
I Any T Any N M0
II Any T Any N M1
Patient age ≥ 45 years old at diagnosis
I T1a N0 M0
T1b N0 M0
II T2 N0 M0
III T1a N1a M0
T1b N1a M0
T2 N1a M0
T3 N0 M0
T3 N1a M0
IVa T1a N1b M0
T1b N1b M0
T2 N1b M0
T3 N1b M0
T4a N0 M0
T4a N1a M0
T4a N1b M0
IVb T4b Any N M0
IVc Any T Any N M1
Modified with permission from the AJCC Cancer Staging Manual, Seventh Edition, Springer-
Verlag, New York
Table 2. AJCC 7th edition/TNM Classification System for
Differentiated Thyroid Carcinoma (cont'd)
