Table 1.

Comparison of Clinical Characteristics of Well-differentiated-(WDTC), Poorly Differentiated-(PDTC), and Anaplastic Thyroid Carcinomas (ATC) at a Median Follow-up of 43 Months

Clinical factor	WDTC (n = 15)	PDTC (n = 12)	ATC (n = 15)	p-value
Female sex	6 (40%)	9 (75%)	9 (60%)	0.1
Age less than 45 years	4 (27%)	0 (0%)	1 (7%)	0.05
Extrathyroidal extension	5 (33%)	8 (73%)	15 (100%)	<0.0001
Tumor size > 4.0 cm	2 (13%)	8 (73%)	9 (69%)	0.0001
Lymph node metastasis	7 (47%)	7 (64%)	15 (100%)	0.0007
Distant metastasis	0 (0%)	6 (50%)	13 (87%)	<0.0001
5-years disease-free survival	91%	51%	0%	<0.0001
5-years cause-specific survival	100%	70%	0%	<0.0001
Overall survival	100%	70%	0%	<0.0001