Fig. 2. Benign nodule with isolated macrocalcification in a 39-year-old woman.

A. Transverse sonogram shows a calcified nodule (9 mm) with slightly lobulated contour and interruption (arrow) of the anterior margin. B. The tip (arrowhead) and specimen notch (arrow) of a partially penetrated stylet cannula are seen on the ultrasound obtained immediately after firing of the stylet cannula under the hyperechoic anterior margin through the medial approach (left). Ultrasonography (right) shows the full penetration of the stylet cannula into the nodule by manually advancing the stylet cannula within the nodule. C. Computed tomography demonstrates that the isolated macrocalcification correlates with compact coarse macrocalcification.