Table 2.

Common immunohistochemical staining used in poorly differentiated thyroid carcinoma (PDTC).

Immunohistochemical Staining	PDTC
Calcitonin	−
Chromogranin A	no data
Synaptophysin	no data
Thyroglobulin	+
Galectin-3	−/+
HBME-1	−/+
PanCK	+
TTF1	−/+
CK7	−/+
CK19	−/+
PAX8	−/+