Breast asymmetry is a highly common and typically normal part of human development, with some experts estimating that up to 90% of women have some degree of variation between their breasts. While “breasts are sisters, not twins” is a common industry saying, several factors contribute to why they may differ in size, shape, or position. 

Common Natural Causes

  • Genetics: Heredity is a primary driver of breast appearance. If a family history of uneven breasts exists, an individual is more likely to develop them similarly.
  • Hormonal Fluctuations: Breasts often develop at different rates during puberty, sometimes resulting in permanent asymmetry. Later in life, hormonal changes during menstrual cycles, pregnancy, or menopause can cause temporary or lasting changes in breast tissue density and size.
  • Weight Changes: Breasts are composed significantly of fatty tissue. When a person gains or loses weight, the body may store or shed fat unevenly between the two sides.
  • Breastfeeding: Asymmetry can occur if a baby prefers feeding from one side more than the other, or if one breast naturally produces more milk. 

Structural and Medical Factors

  • Skeletal Framework: The underlying rib cage or spine can affect how breasts sit. For instance, scoliosis (curvature of the spine) can widen one side of the chest wall, causing one breast to appear lower or projected differently than the other.
  • Tuberous Breast Deformity: This congenital condition restricts normal development, often causing the breasts to grow in an elongated, narrow shape. It frequently affects one breast more significantly than the other.
  • Poland Syndrome: A rare condition where the chest muscle (pectoralis) is missing or underdeveloped on one side, leading to a visible lack of breast volume and contour on that side.
  • Other Conditions: Juvenile hypertrophy (extreme rapid growth on one side) or breast hypoplasia (underdevelopment of tissue) can also result in pronounced differences. 

While most asymmetry is harmless, you should consult a professional if you notice sudden or unexplained changes in size, shape, or density. Such shifts can sometimes indicate underlying issues like cysts, benign tumors, or, in rarer cases, breast cancer.

Because the anatomy of every patient is unique, it is best to attend a consultation to understand the best approach for you. Your surgeon will tailor a combination of techniques to achieve the best result.

Breast asymmetry requires a highly individualised approach that prioritises precision to achieve a natural, balanced result. Because asymmetry can involve differences in volume, shape, or position, the combination of surgical techniques used is carefully tailored to the unique anatomy of the patient. 

Surgical Techniques for Correction

  • Breast Augmentation: For patients where one breast is smaller than the other, breast implants may be used to add volume to the smaller side or both sides using different sized implants to achieve balance.
  • Dual-Plane Placement: A partial subpectoral dual-plane placement for implants, which helps create a more natural shape over time, can be used.
  • Breast Lift: If one or both breasts are sagging at different levels, a lift is used to reposition the nipple-areola complex and breast tissue to a more symmetrical height.
  • Breast Reduction: In cases where one breast is significantly larger, excess tissue is removed from the larger side to match the smaller one.
  • Structural Fat Grafting: For minor irregularities or to refine the results of an augmentation, fat transfer can be used to add subtle volume and improve the overall contour and cleavage. 

The Consultation Process

A cornerstone of the Wood MediSpa approach to correct of breast asymmetry is the surgeon-led consultation. All pre-surgical consultations at Wood MediSpa are held with your chosen plastic surgeon. During this appointment your chest wall anatomy, tissue quality, and the degree of asymmetry will be assessed in order to develop a bespoke plan that may involve a single procedure or a “hybrid” approach combining multiple techniques. 3D Modelling using the Canfield Vector H2 system is also possible.