breast lobule


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breast lobule

The basic functional unit of the mammary gland, consisting of a tree of several intralobular ducts (also called alveolar ducts), each of which can develop a terminal alveolus composed of milk-secreting epithelial cells. Together, the breast lobules that empty into the same lactiferous duct form a breast lobe.
See also: lobule
References in periodicals archive ?
However, after she completes a full-term pregnancy, 70% of a woman's breast lobules have become mature, cancer-resistant Type 3 lobules.
During the "susceptibility window," nearly all of the breast lobules consist of cancer-susceptible Type 1 and 2 lobules, where 95% of all breast cancers originate.
That is because by the end of a 40-week pregnancy, 85% of a woman's breast lobules have become mature, cancer-resistant lobules known as Type 4 lobules.
Abundant breast lobules were present in the adjacent breast tissue in all cases in this subgroup, but these showed little evidence of active lactational change.