Ductal system of the breast
We have demonstrated this histological section before but the focus was on the lobules. At this time we focus on the ductal system, with a main duct subtending terminal 3 extralobular terminal ducts. The intralobular terminal duct is implied and cannot be resolved as a separate structure at this level. The acini, which are not clearly delineated on this image are smaller units of the lobule, which are subtended by ductules.
Davidoff Art Copyright 2014 Courtesy Frank Reale MD