label: thyroid gland spindle cell tumor with thymus-like differentiation
label_lc: thyroid gland spindle cell tumor with thymus-like differentiation
description: 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.