What is accessory breast tissue?
Accessory breast tissue is glandular breast tissue located outside the normal breast area, most commonly in the underarm (axillary) region. Unlike simple fatty tissue, it may respond to hormonal stimulation.
Is accessory breast tissue harmful?
Accessory breast tissue may cause fullness, tenderness, cyclical swelling, or cosmetic concerns rather than always requiring treatment. Because it is breast tissue, any new or changing underarm lump should be evaluated by a doctor rather than assumed to be harmless.
Can it become larger during pregnancy?
Yes. The tissue is hormone-responsive, so it may enlarge or become more noticeable during hormonal changes such as puberty, pregnancy, or breastfeeding.
How is it diagnosed?
Assessment typically includes a physical examination, medical history, ultrasound imaging when appropriate, and additional imaging if clinically indicated. Ultrasound can help identify glandular tissue within the axillary region.
Will treatment leave a scar?
Any surgical treatment involves an incision and therefore the possibility of a scar. The expected incision, its location, and healing should be explained by your surgeon during consultation, as this depends on the treatment approach.
What is the milk line?
During fetal development, breast tissue forms along paired lines extending from the armpits to the groin. Normally breast tissue develops only in the chest; when residual tissue remains elsewhere along this line, accessory breast tissue may develop.
What causes accessory breast tissue?
Contributing factors may include congenital persistence of breast tissue along the milk line, hormonal influences, pregnancy and breastfeeding, and genetic or developmental factors.
Is liposuction alone enough to treat it?
Not always. Liposuction may address associated fatty tissue when appropriate, but glandular tissue is managed differently. Treatment may involve removal of glandular tissue, liposuction, or a combination, determined after clinical evaluation.
What is recovery like?
Recovery depends on the extent of treatment. Temporary swelling, bruising, and mild discomfort are common during early healing, and patients receive individualized postoperative care instructions.
