Fig. 13.
In the ACRIN 6666 protocol, on baseline screening a 54-year-old woman by (A) radial and (B) antiradial ultrasonography, a small cyst was incidentally identified, which communicates with a duct (arrowheads). The cyst contains a single thin septation (arrow). This is a benign finding. (Courtesy of Wendie A. Berg, MD, PhD, Lutherville, MD.)