Which breast tissue is typically assessed when using the MLO projection?

The MLO (Mediolateral Oblique) projection is specifically designed to provide a comprehensive view of the breast, and it primarily assesses medial breast tissue. In this projection, the x-ray beam is angled from the medial side (inner side) of the breast toward the lateral side (outer side), allowing for optimal visualization of structures located toward the chest wall.

This orientation is particularly important for detecting abnormalities in the medial or inner aspects of the breast, where many lesions may be located. Additionally, it helps in evaluating the axillary tail of Spence, which is often included in the imaging area when using this projection.

By analyzing the medial breast tissue, radiologists can identify potential masses, calcifications, and other pathological changes that might not be as clearly visible in other projections. Hence, the use of the MLO projection is essential for thorough breast cancer screening and diagnostics.