Sections show a well-circumscribed nodular lesion composed of variable-sized, colloid-filled thyroid follicles ranging from microfollicles to cystically dilated macrofollicles. The follicles are lined by a single layer of bland cuboidal to flattened epithelium with focal benign hyperplastic papillary infoldings. No nuclear atypia, capsular invasion, or vascular invasion is identified.
Pretracheal nodule.
Soft tissue fragment measured 1.5x0.8x0.7 cm, totally embedded.
Pre-tracheal nodule, excision biopsy: