this example of apocrine DCIS is one of that involving extensive sclerosing adenosis, making it look like invasive ca Image

irregular ductal structures are those of adenosis, lined by cells with lots of pink cytoplasm Image

here is a nice area Image

see the apocrine cells arranged in an architecture of dcis Image

larger and smaller ducts, can see a two cell layer if you look carefully Image

cribriform areas Image

smooth muscle actin confirms that it is indeed an in situ process even though so complex looking Image

you can see the apocrine cells in this duct, surround by p63 positive basal cells Image