Certified Breastfeeding Counselor (CBC) Practice

Where is accessory nipple or breast tissue most likely to be found?

1. Axilla

2. Inguinal region

3. Neck

4. Lower back

The correct answer is: Axilla

Most people develop accessory nipple or breast tissue in the axilla or armpit area because that is where mammary lines, the milk-producing tissues in early fetal development, extend from the chest to the groin. The inguinal region (B) is the area between the lower abdomen and thigh, where genital and inguinal lymph nodes are found, so it is not a common location for accessory breast tissue. The neck (C) is another common location for accessory nipple or breast tissue, but it is not as common as the axilla. The lower back (D) is an incorrect option because it is not a common location for accessory nipple or breast tissue.