True mixed medullary papillary carcinoma of the thyroid: A case report with low blood calcitonin levels

摘要

A 24-year-old woman with no personal or family history of thyroid malignancy presented with an asymptomatic solid nodule on the right lobe. A thyroid ultrasonography revealed a 2-cm, irregular, solid and vascularized nodule, on the right lobe. An ultrasound-guided fine needle aspiration (FNA) was then performed, and the cytological findings were consistent with medullary carcinoma. A preoperatory evaluation neck ultrasound was negative for malignant lymph nodes, and calcium and calcitonin blood levels were normal. The patient then was admitted for a total thyroidec-tomy without lymph node dissection procedure. After 2 years of follow-up, the patient is asymptomatic, normo-calcemic and with a neck ultrasound without remarkable findings.