Fig. 2

Association between thyroid nodule size and surgical pathology diagnosis in patients with benign USFNA biopsies. Nodule sizes on pre-operative ultrasounds were subdivided into categories a) 1–1.9 cm, b) 2–2.9 cm, c) 3–3.9 cm, d) ≥4 cm. USFNA: Ultrasound guided fine needle aspiration