Primary Squamous Cell Carcinoma of the Thyroid Diagnosed as Anaplastic Carcinoma: Failure in Fine-Needle Aspiration Cytology?

Table 1

Preoperative laboratory findings (serum concentrations).

Tests	Value
TSH	4.67 uIU/mL (0.35–4.94 uIU/mL)
FT4	1.24 ng/dL (0.7–1.48 ng/dL)
TPO Ab	811 UI/mL (<5.61 UI/mL)
CEA	3.76 ng/mL (>5 ng/mL)
Calcitonin	<2.0 pg/mL (<11.5 pg/mL)

CEA: carcinoembryonic antigen; FT4: free thyroxine; TPO Ab: thyroid peroxidase antibody; TSH: thyroid stimulating hormone.