What is the thickest portion of the breast commonly referred to as?

The thickest portion of the breast is commonly referred to as the Tail of Spence. This area is an extension of the breast tissue that extends into the axilla (armpit) and is anatomically significant due to its volume and the presence of glandular tissue. The Tail of Spence is where breast tissue may extend posteriorly and laterally toward the underarm area, making it a critical region to consider during breast examinations and mammography, as it is a common site for breast pathology, including cancers.

Identifying and understanding the Tail of Spence helps in ensuring that imaging procedures capture this area effectively, as it may contain abnormalities that could be missed if not properly evaluated. The prominence of the Tail of Spence is also important for surgical considerations and patient education regarding self-breast examinations, emphasizing the need to check this area for any lumps or changes.