Endocrine Abstracts

Introduction: Anaplastic thyroid carcinomas (ATCs) are sometimes accompanied by well-differentiated carcinomas (WDCs), and ATCs have been speculated to be dedifferentiated from the preexisting or coexisting WDCs. We will present two cases determined with both ATC and papillary thyroid carcinoma (PTC.)Case 1: A 82-year-old woman was investigated due to a painful neck mass. Thyroid function tests were normal. Thyroid ultrasonography revealed isohypoechoic ...