Differentiated Thyroid Cancer with Extrathyroidal Extension: Prognosis and the Role of External Beam Radiotherapy

Table 1

Distribution of candidate prognostic factors and treatments.

	All $N=323$
	$N$	%
Histology
Follicular	60	18.58
Papillary	261	80.80
Gender
Female	239	73.99
Male	84	26.01
Age
$<$45	134	41.49
45–60	95	29.41
$>$60	93	28.79
Size
$<$1 cm	20	6.19
1–4 cm	187	57.89
$>$4 cm	72	22.29
Differentiation
Moderate	37	11.46
Poor	52	16.10
Well	98	30.34
Nodal involvement
No	148	45.82
Yes	149	46.13
Postoperative status
Gross	28	8.67
No residual/microscopic	259	80.19
Multifocal
No	187	57.89
Yes	119	36.84
Margin status
Negative	195	60.37
Positive	92	28.48
LVI (Lymph vascular Invasion)
No	87	26.93
Yes	130	40.25
T category
3	169	52.32
4a	91	28.17
4b	58	17.96
Surgery
Biopsy	22	6.81
Lobectomy	64	19.81
Near total	80	24.77
Radical	7	2.17
Total	146	45.20
RAI (Radioactive Iodine)
No	65	20.12
Yes	258	79.88
XRT
No	115	35.60
Yes	208	64.40