Calcitonin-negative neuroendocrine tumor of the thyroid with metastasis to liver-rare presentation of an unusual tumor: A case report and review of literature

Figure 4 Magnetic resonance images of liver metastases. A: An oval mass in the left liver before transcatheter arterial chemoembolization with a clear boundary and diameter of about 1.9 cm; B, C, D: Magnetic resonance imaging 3 mo after transcatheter arterial chemoembolization revealed no significant reduction in the original metastatic tumor in the left liver and appearance of a new metastatic tumor in the right liver (arrow).