This image represents one of the common mammographic views. The breast tissue is compressed in a medial lateral oblique (MLO) orientation in order to obtain a large surface area for imaging. Fibroglandular tissue, the breast ducts and lobules, comprises the bulk of the dense material seen in a mammogram. All normal breast tissue lies superficial to the pectoralis major muscle, and is separated from this muscle by clavipectoral fascia.

Identify the following:

1. nipple

2. fibroglandular tissue

3. pectoralis major muscle

4. subcutaneous adipose tissue