43 breast diagram quadrants
• there is a single tumor located at the 12, 3, 6, or 9 o’clock position on the breast Code the primary site to C509 when there are multiple tumors (two or more) in at least two quadrants of the breast. Laterality Laterality must be coded for all subsites. Usually fibroglandular tissue occurs symmetrically in the upper outer quadrants of the breasts. The breast tissue is usually distributed fairly symmetrically from left to right. When viewing mammograms, the clinician should place the mammograms back to back so that the chest walls face each other for easy viewing of tissue symmetry (see Fig. 2-5A). The breasts are divided by an invisible line running up and down and right to left through the nipple. Each of these 4 regions is called a quadrant. · Structure. Breast diagram quadrants