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.
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