Breast asymmetry correction

Breast asymmetry is universal

Every woman has some degree of breast asymmetry — perfectly symmetric breasts essentially don't exist in nature. Most asymmetry is mild and goes unnoticed. The asymmetry that brings women to consultation is moderate or severe asymmetry that's visible in clothing, complicates bra fitting, or causes self-consciousness.

Types of breast asymmetry

Volume asymmetry

• One breast significantly larger than the other
• Most common asymmetry pattern
• Cup-size difference is the typical metric (1/2 to 2 cup sizes)
• May develop during puberty or after pregnancy

Position asymmetry (ptosis difference)

• One breast sits lower than the other
• Different ptosis grades on each side
• Often combines with volume asymmetry

Shape asymmetry

• Different shapes between the two breasts
• One more conical, one more rounded
• One with more upper pole fullness, one more lower-pole heavy

Nipple-areolar asymmetry

• Different NAC size between sides
• Different nipple position relative to breast meridian
• Different areolar diameter

Chest wall asymmetry

• Underlying chest wall (ribs, sternum) is asymmetric
• Cannot be fully corrected by breast surgery alone
• Includes pectus excavatum and pectus carinatum variants
• Often produces apparent breast asymmetry that has chest wall basis

Tubular/tuberous breasts

• Constricted breast bases with herniation through areola
• Often asymmetric — one side more affected
• Specific surgical approach needed (different from standard mastopexy)

Surgical approaches to asymmetry correction

Volume asymmetry correction

• Augmentation of the smaller side with implant — most common approach
• Reduction of the larger side — when both breasts are larger than desired
• Lift of the larger side — when the larger side is also droopy
• Combined — augmentation of smaller + reduction or lift of larger

Position asymmetry correction

• Different mastopexy patterns on each side — for example, periareolar on the less ptotic side, vertical on the more ptotic side
• Different lift amounts with same pattern on both sides
• Important constraint: NAC final position should be symmetric even if surgical approaches differ

NAC asymmetry correction

• Areolar reduction on the larger side
• NAC repositioning via mastopexy
• Eccentric mastopexy — non-circular periareolar incision to shift NAC position

What cannot be perfectly corrected

Significant chest wall asymmetry

Underlying ribcage asymmetry produces apparent breast asymmetry that breast surgery cannot fully correct. Patients should understand that:

• Pectus excavatum (sunken chest) makes the breast appear positioned more posteriorly
• Pectus carinatum (protruding chest) creates apparent volume difference
• Scoliosis affects breast position and apparent symmetry
• Breast surgery can compensate partially but not eliminate underlying chest asymmetry

Subtle remaining asymmetry

• Even after well-executed asymmetry correction, some asymmetry remains
• The goal is "near-symmetric" and "not noticeable in clothing" — not perfect symmetry
• Patients seeking absolute symmetry will be disappointed

The pre-operative assessment

Detailed assessment of asymmetry includes:

• Volume measurements — clinical and sometimes 3D imaging
• Photography — front, oblique, lateral, with and without arms raised
• Position measurements — sternal notch to nipple distance on each side; nipple to IMF; breast meridian
• NAC measurements — areolar diameter, nipple position
• Chest wall examination — to identify underlying skeletal asymmetry
• Posture assessment — for scoliosis or postural causes

This assessment determines whether the asymmetry has soft tissue basis (correctable by surgery) or chest wall basis (partially correctable).

Implant choice for volume asymmetry

When using implants to correct volume asymmetry:

• Different implant sizes on each side — common approach
• One implant on the smaller side only — when the larger side is satisfactory
• Different profile implants — same volume but different projection
• Different implant types rarely indicated — typically same type both sides

Realistic outcomes

• Successful asymmetry correction reduces visible difference to mild — typically not noticeable in clothing
• Patients usually go from 1-2 cup difference pre-op to imperceptible difference post-op in clothing
• Photography may still show some asymmetry on close inspection
• Patient self-perception often differs from external perception — what feels asymmetric to the patient is often invisible to others
• Combined with mastopexy or augmentation, asymmetry correction adds meaningful value to the overall result

Frequently asked questions