Does fat move or migrate to other areas after fat transfer lipofilling?

Transplanted and engrafted fat is not a liquid but a dense cellular structure. The body has no empty spaces, so this dense structure simply has nowhere to move. The transplanted fat tissue always remains where it was injected. The only nuance is that the fat may descend together with the surrounding area over time due to age-related ptosis, which is sometimes mistaken for fat migration after lipofilling.

Reasons Fat May Not Survive

• Adipocytes were damaged during the operation
• Adipocytes were injected in large clusters
• Excessive volume was introduced into one point
• Insufficient blood supply in the grafted area

Why Fat Usually Cannot Migrate

Patients often ask, “does fat move after fat transfer?” In normal healing, the answer is no. If the fat does not take, most of it is broken down by the body into its components and removed. A smaller portion, however, can form cysts or small collections of so-called “oil.”

This material behaves like a liquid and, if located on or within a muscle layer, can create the appearance of fat grafting migration or fat displacement after lipofilling as it moves slightly along a contracting muscle. Typically, this occurs only near the lipofilling zone and is possible only on the body—there is no need to worry about the face.

If a cyst forms, the body encapsulates the “oil,” isolating it.

Read more: How much fat survives after breast fat transfer and how long do the results last? 

How to treat cysts after lipofilling?

Management depends on diameter:

• Cysts about 1 cm are punctured under ultrasound guidance: the contents are evacuated and the cyst collapses.
• If smaller than 0.5 cm, a conservative approach is chosen—medications and physiotherapy.
• Tiny cysts (1–2 mm) usually disappear on their own.

Another situation where transplanted fat may settle outside the intended area is when the liposuction zone directly adjoins the lipofilling zone—for example, the transition from buttock to outer thigh. In this case, some of the transplanted fat can end up in the liposuction area because an early-stage cavity exists there. This causes no harm, and the patient typically does not notice it.