Fine-needle aspiration cytology of an intrathyroidal nodule diagnosed as squamous cell carcinoma: A case report

Figure 4 Microscopic features of tissue. A: Hematoxylin and eosin-stained section of the thyroid mass showing cellular nests of epithelioid cells surrounded by fibrous cells. Toward the end of the tissue, normal thyroid follicles can be observed (×50); B: Tumor cells arranged in nests next to each other in a mosaic pattern with disordered cell polarity (×100); C: Tumor cells with enlarged nuclei with deep staining and rough chromatin, although they are chromatin-rich (×200).