Accessory breast tissue

Accessory breast tissue, also known as supernumerary or ectopic breast tissue, is a congenital condition where extra breast tissue develops outside the usual breast area.

This additional tissue can occur anywhere along the 'milk line,' an embryonic ridge extending from the armpit to the groin, but it is most commonly found in the axillary (underarm) region.

While accessory breast tissue is often benign and asymptomatic, it can present as a palpable mass and might become more noticeable or symptomatic during hormonal changes, such as puberty, menstruation, pregnancy, or lactation.

This tissue can undergo the same physiological changes as normal breast tissue, including cyclical tenderness or enlargement.

Although typically not associated with significant health issues, accessory breast tissue can sometimes develop similar pathologies to normal breast tissue, including fibroadenomas and, rarely, breast cancer.

The diagnosis is often clinical, but imaging techniques such as ultrasound or MRI, included within torso scans, can be employed to confirm the presence of accessory breast tissue and assess its characteristics.

Treatment is generally not necessary unless the tissue causes discomfort, cosmetic concerns, or other complications, in which case surgical removal may be considered.

Understanding this condition is crucial for appropriate monitoring and management, especially in individuals experiencing symptoms or with a family history of breast conditions.