The smears show mild to moderate cellularity consisting predominantly of bland thyroid follicular epithelial cells. These cells are arranged in cohesive, monolayered sheets, small clusters, and occasional macrofollicular fragments. The follicular cells exhibit uniformly round to oval nuclei, evenly dispersed chromatin, and scant to moderate cytoplasm. There is no evidence of nuclear crowding with overlapping, nuclear grooves, intranuclear pseudoinclusions, or significant pleomorphism to suggest papillary thyroid carcinoma or other malignancies. The background contains thin and thick colloid, abundant red blood cells (hemorrhage), and scattered foamy macrophages.
Bilateral thyroid enlargement with suspicious (TIRADS IV) nodules—most notably a large, ill-defined, calcified left-lobe mass showing mild retrosternal extension and possible tracheal encasement.
Nineteen smears were submitted and stained.
Left thyroid lobe mass (FNAC):