What is the term for the extension of breast tissue into the axilla?

The term for the extension of breast tissue into the axilla is known as the axillary tail of Spence. This anatomical feature refers to the projection of breast tissue that extends toward the armpit area and is considered a significant aspect of breast anatomy. Understanding this extension is important in both clinical assessment and imaging of the breast, as it can impact mammography interpretations and is relevant in the context of breast cancer screening and surgical procedures.

Other terms provided, such as breast quadrant, superior pole, and inframammary fold, delineate different aspects of breast anatomy but do not specifically refer to the extension of breast tissue into the axillary region. The breast quadrant refers to the division of the breast into sections for examination; the superior pole is the upper part of the breast; and the inframammary fold is the crease where the breast meets the chest wall. While these terms are relevant to breast anatomy and imaging, they do not describe the particular extension of tissue into the axilla like the axillary tail of Spence does.