Breast Implants Too Close Together: Symmastia Repair

Breast implants that sit too close together can create a condition known as symmastia, sometimes called “uniboob.” This occurs when the implants migrate toward the center of the chest, reducing or eliminating the natural separation between the breasts. In Korea, where precise breast contouring and natural cleavage balance are highly emphasized, symmastia is a recognized but relatively uncommon complication that often requires revision breast surgery.

What Is Symmastia?

Symmastia is a condition where the implant pockets merge or extend too far toward the midline of the chest, causing the breasts to lose their natural separation.

Typical signs include:

• Lack of visible cleavage gap
• Implants appearing to touch in the center
• Continuous breast shape across the chest
• Medial swelling or fullness
• Difficulty distinguishing left and right breast boundaries

It can affect one or both breasts depending on severity.

Why Does Symmastia Happen?

Symmastia occurs when the medial (inner) implant pockets are over-dissected or weakened.

Common causes include:

• Excessive surgical dissection near the sternum
• Overly large implants for chest width
• Weak or thin medial tissue support
• High implant pressure pushing inward
• Previous revision surgeries weakening tissue
• Aggressive attempts to create cleavage during surgery

These factors can allow implants to shift toward the center.

Early vs Late-Onset Symmastia

Symmastia can develop soon after surgery or gradually over time.

Early-onset symmastia:

• Appears shortly after surgery
• Often related to surgical technique
• More structurally driven

Late-onset symmastia:

• Develops months or years later
• Often caused by tissue weakening or implant pressure
• May worsen gradually

Both types require careful evaluation.

Aesthetic and Functional Concerns

Symmastia can significantly affect breast appearance and patient satisfaction.

Common concerns include:

• Loss of natural cleavage definition
• “Uniboob” appearance across the chest
• Difficulty wearing fitted clothing or bras
• Loss of breast individuality
• Visible distortion in upper chest contour

Although not typically painful, it can be visually distressing.

How Is Symmastia Diagnosed?

Diagnosis is primarily clinical, based on physical examination and implant behavior.

Evaluation may include:

• Visual inspection of breast midline separation
• Palpation of implant position and mobility
• Assessment of implant pocket boundaries
• Review of surgical history
• Imaging (ultrasound or MRI in complex cases)

This helps determine severity and underlying cause.

Can Symmastia Fix Itself?

In most cases, established symmastia does not resolve on its own.

However:

• Mild early cases may stabilize if caught quickly
• Structural pocket disruption usually persists
• Progressive cases may worsen without treatment

Surgical correction is often required for meaningful improvement.

Symmastia Repair Surgery Options

Revision surgery aims to reconstruct the medial implant pocket and restore natural breast separation.

Common techniques include:

• Medial capsulorrhaphy (internal suturing of the pocket)
• Reinforcement of the sternum-side tissue
• Repositioning of implants laterally
• Capsulectomy in affected areas
• Implant exchange to reduce size or pressure
• Use of internal support materials in severe cases

The goal is to recreate a stable midline boundary.

Capsulorrhaphy for Medial Reconstruction

Capsulorrhaphy is the most important technique in symmastia correction.

It involves:

• Suturing and tightening the inner implant pocket
• Re-establishing separation between breasts
• Preventing medial implant migration
• Strengthening weakened tissue near the sternum

This helps restore natural cleavage structure.

Role of Implant Exchange in Repair

In many cases, implant replacement is necessary alongside pocket repair.

Implant adjustments may include:

• Reducing implant size to decrease pressure
• Switching to lower projection implants
• Selecting implants better suited to chest width
• Improving overall balance and support

This reduces recurrence risk.

Recovery After Symmastia Repair

Recovery focuses on stabilizing the newly reconstructed pocket.

Typical timeline:

• First week: swelling and tightness across chest
• 2–4 weeks: gradual return to daily activity
• 1–3 months: implant stabilization in corrected position
• 6–12 months: final contour refinement

Postoperative support garments are critical for maintaining separation.

Risk of Recurrence

Symmastia can recur if underlying causes are not fully addressed.

Risk factors include:

• Oversized implants
• Weak medial tissue
• Inadequate pocket reinforcement
• Early pressure on healing tissues
• Multiple prior surgeries

Careful surgical planning is essential to prevent recurrence.

Final thoughts

Breast implants that sit too close together, or symmastia, occur when the internal implant pockets extend too far toward the center of the chest, eliminating natural breast separation. While it is a complex complication, modern revision techniques such as medial capsulorrhaphy, implant repositioning, and implant exchange can effectively restore a natural cleavage and balanced breast contour. With precise surgical planning and proper healing support, most patients can achieve a more defined, symmetrical, and natural-looking result.