Prediction of Cervical Lymph Nodes Metastasis in Papillary Thyroid Carcinoma (PTC) Using Nodal Staging Score (NSS)

Table 3

NSS corresponds to the number of lymph nodes examined.

NSS	The number of lymph nodes examined
	80%	85%	90%	95%
Gender
Male	7	9	12	21
Female	3	4	6	10
Age
≤45	4	5	8	13
>45	3	4	6	10
Extrathyroidal invasion
Negative	2	3	5	9
Positive	14	18	22	40
Multifocal
No	4	5	7	12
Yes	3	4	6	10
Tumor size
≤1 cm	2	2	4	6
1-2 cm	3	5	7	11
2-4 cm	5	6	9	15
> 4 cm	4	8	13	20
T stage
T1	2	3	4	7
T2	3	5	6	11
T3	3	11	15	25
T4	25	32	—	—