Metastatic Follicular Thyroid Carcinoma Secreting Thyroid Hormone and Radioiodine Avid without Stimulation: A Case Report and Literature Review

Table 1

Thyroid function tests and thyroglobulin levels from Nov. 2010 to Mar. 2014.

Visit date	TSH (µIU/mL)	FT4 (ng/dL)	Thyroglobulin (ng/mL)
Nov. 3, 2010	0.023	2.13	2063
Jan. 12, 2011	0.077	2099	965
Jul. 13, 2011	0.015	1.94	2506
Nov. 2, 2011	1.23	0.72	5019
Mar. 7, 2012	0.37	0.89	5178
Jun. 6, 2012	10.34	0.51	8318
Mar. 12, 2014	0.35	1.55	2632

Abbreviations and normal values: FT4 (free T4) 0.58–1.64 ng/dL; FT3 (free T3) 2.5–3.9 pg/mL; TSH (thyroid stimulating hormone) 0.34–5.6 µIU/mL; thyroglobulin 1.6–50 ng/mL.