CAMRT Radiography Practice Exam

Which aspect of the breast does the MLO position in a mammogram primarily illustrate?

1. Medial and lateral aspects of the breast

2. Axillary tail and lymph nodes of affected breast

3. Internal structures of the breast

4. Entire breast volume

The correct answer is: Axillary tail and lymph nodes of affected breast

The correct understanding of the MLO (medial-lateral oblique) position in a mammogram primarily emphasizes the axillary tail, which is the part of the breast that extends towards the armpit. This angle allows for visualization of structures in the upper outer quadrant of the breast and is crucial for assessing any abnormalities that may be present in the axillary region, including the lymph nodes and potential lesions. The MLO view is significant because it not only captures the breast tissue but also provides critical insight into the lymphatic drainage of the breast, especially the axillary lymph nodes, which can be indicative of the spread of breast cancer. This particular positioning is therefore essential in breast imaging as it targets areas that are often clinically relevant for staging and treatment planning of breast diseases. Other positions in mammography, while important, focus on different aspects such as the medial and lateral portions or the internal structures without the specific emphasis on the axillary tail and the surrounding lymph nodes that the MLO view provides.