[A rare, slow growing, primary carcinoma of the thyroid gland characterized by a lobulated architectural pattern and the presence of a biphasic cellular population composed of spindle epithelial cells and glandular cells. A small number of cases are composed exclusively of spindle epithelial cells or glandular cells. ( NCI )]
UMLS (NCI) C1266099Thyroid Gland Spindle Cell Tumor with Thymus-Like Differentiation