The area you want fat to stay the most is also the area where it’s least likely to survive.

In breast fat grafting, the goal is to achieve a natural volume increase and smooth contours. However, the cleavage (the area near the sternum) remains one of the most challenging parts to maintain long-term results.

Even though many patients desire more volume here, this area is under high skin tension and has limited blood flow, making fat survival much lower compared to other parts of the breast.

Why the Cleavage Area Is Difficult

During hybrid breast augmentation (combining silicone implants and fat grafting), fat is often added around the cleavage and décolletage to create a softer, more natural look.

However, the injected fat cells in these areas struggle to reestablish blood supply — which is essential for survival.

As a result, even if the cleavage looks perfect right after surgery, some of the fat inevitably gets absorbed over the next few months.

Improving Fat Survival Rates

The average fat retention rate after grafting is around 30–50%, even under ideal conditions.

This means about half of the injected fat will be naturally absorbed by the body.

Still, proper surgical planning and post-operative care can make a big difference:

• Accurate layering: Injecting small amounts of fat in multiple layers improves vascularization.
• Balanced injection volume: Over-injecting increases the risk of necrosis and oil cysts.
• Healthy post-op habits: No smoking, good nutrition, and adequate rest are essential.
• Staged procedures: Performing fat grafting multiple times results in higher overall retention and fewer complications.

Case Example

The patient below underwent hybrid breast augmentation (Motiva Demi 225cc + 90cc right / 60cc left fat injection).

At 3 months post-op, while some fat loss was seen in the cleavage area, overall breast volume and roundness were maintained beautifully.

The subtle, natural curve of the chest remained — a result of careful layer-by-layer injection.

When to Consider a Second Fat Grafting

If your goal is to further enhance the cleavage or upper pole volume, an additional fat grafting session after the hybrid procedure can be very effective.

By spacing the sessions apart, the fat can settle more safely, minimizing the risk of lumps or infection while improving long-term stability.

AVAN TOKYO’s Commitment to Natural Results

At AVAN TOKYO GINZA LIPOSUCTION CLINIC, we perform all fat grafting with extreme precision — from harvesting and purification to reinjection.

Our focus is not just to increase size, but to sculpt a balanced, elegant upper body line.

We prioritize both safety and artistry, ensuring results that are long-lasting and harmonize naturally with your body.