FIGURE 2
From: Morphological Changes in Breast Tissue with Menstrual Cycle

Stage 2 of menstrual cycle. A, low magnification of lobule in Stage 2 showing appearance of vacuolation in the myoepithelial layer with prominent distinction between the two layers of the acini. H&E; 100 ×. B, high magnification of Stage 2 showing increasing tendency for basal vacuolation. H&E; 400 ×.