Breast - Normal terminal ductal lobular units

Histology of normal female breast ducts and terminal ductal lobular units (TDLU):
(A) Major duct at low magnification (6.3x) (slide 11).
(B) Several TDLU at low magnification (10x) (slide 16).
(C) Sharp interphase between dense extralobular connective tissue and each TDLU (25x magnification) (slide 17).
(D) Loose intralobular stroma investing ductules (63x magnification) (slide 18).
(E) Single duct cut transversely revealing an inner layer of secretory cells with abundant mitochndria and an outer sparse cell layer of myoepithelium with sparse cytoplasm (25x magnification).