Fig. 1From: Diagnostic pitfall of thyroid fine-needle aspiration induced fibrosis: follicular adenoma mimicking medullary thyroid carcinoma in frozen sectionUltrasonographic and cytologic features of the thyroid mass. a Ultrasonography reveals a relatively well-circumscribed thyroid mass on the right lobe (arrow). b Some follicular cells showing nuclear enlargement and pale chromatin pattern in cytologic evaluation of FNA specimen (H&E stain; original magnification, × 1000)Back to article page