The tail of Spence is important because it extends into which part of the breast?

The tail of Spence is a significant anatomical feature of the breast because it extends into the upper-outer quadrant. This region is clinically important as it is often where breast tissue density is highest and where a larger portion of breast cancer cases may be identified. The upper-outer quadrant's proximity to the axilla also underscores its relevance in breast pathology, as lymphatic drainage occurs in this area. Understanding the specific location of the tail of Spence aids radiologists and mammographers during imaging procedures, as they can focus more closely on this area for potential abnormalities and make precise assessments during breast cancer screening and diagnosis.