Do medullary thyroid carcinoma patients with high calcitonin require bilateral neck lymph node clearance? A case report

Figure 4 Paraffin pathology (right thyroid). A and B: Photomicrographs showing hematoxylin-eosin (H&E) staining of a left thyroid nodule. The medullary thyroid carcinoma (MTC) component was mainly composed of irregular and solid nests of pleomorphic cells surrounded by a fibrovascular stroma with abundant amounts of acidophilic homogenous material, with large and polygonal cells, prominent nucleoli, and finely granular cytoplasm; C and D: The tumor cells of the MTC showed strong immunoreactivity for calcitonin and were negative for thyroglobulin.