Follicular Variant of Papillary Thyroid Carcinoma on the Basis of Histopathological and Immunohistochemical Diagnosis

A significant increase in incidence of papillary thyroid carcinoma (PTC) has been noticed in recent decades worldwide. This is due to advances in medical surveillance, increased use of ancillary tests, and a minor component due to over diagnosis of PTC. Follicular variant of papillary thyroid carcinoma (FVPTC) is the second most common variant of PTC and comprises about 23-41%. It is difficult to diagnose histologically when the distinctive nuclear features are either not well developed or present focally within the lesion. Several immunohistochemical markers (CD56, HMCK, GAL3, HBME-1 and CK19) either alone or combined in panels can be used to improve diagnostic accuracy.


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