An adenocarcinoma arising from the follicular cells of the thyroid gland. According to the degree of differentiation, it is classified either as differentiated carcinoma (extensive evidence of follicular cell differentiation), or poorly differentiated carcinoma (limited evidence of follicular cell differentiation).
Thyroid Gland Oncocytic Follicular Carcinoma
Thyroid Gland Spindle Cell Tumor with Thymus-Like Differentiation