Fig. 3.

CNB histology and surgical pathology of a minimally invasive follicular carcinoma. a This CNB histology specimen shows a microfollicular proliferative lesion (thin arrow) with a fibrous capsule (thick arrow), diagnosed as FN/SFN. b Histology of the surgical specimen demonstrates tumor, encapsulation and focal minimal tumor invasion to the fibrous capsule (small arrows), diagnosed as minimally invasive follicular carcinoma. The diagnoses of the initial and repeat FNA were FOA and NA, respectively (not shown). HE stain. ×10.