A benign well encapsulated tumor formed of small and large follicles full of colloid and lined by unremarkable cuboidal cells. Adjacent thyroid tissue is compressed. No evidence of hyperfunction or malignancy.
Rt. thyroid mass.
Rt. thyroid hemithyroidectomy specimen measured 6x5x4 cm, with intact capsule. Serial sectioning revealed almost complete replacement by a rubbery nodule measured 5.5x4x4 cm.
Rt. Hemithyroidectomy: