Skeletal Contour · Procedure
Rest your hands on your hips. The ridge under your palms is the iliac crest, the upper border of the pelvis. When it sits high, the gap between it and your lowest rib is short — and a waist with little vertical room to work with cannot curve in, however little fat is over it.
The result is a torso where the change from waist to hip happens as a step rather than a transition. It is a skeletal proportion, not a soft-tissue one, which is why training does not alter it and liposuction reaches its limit early. XCREST reduces the crest itself, increasing the distance between the last rib and the pelvis, so that the waist has somewhere to go.
XCREST is a skeletal waist procedure that reduces the height of the iliac crest — the upper border of the pelvis — increasing the distance between the last rib and the pelvis so that the waist has somewhere to go. Developed by Dr. Raúl Manzaneda Cipriani, AX — Aesthetic Xpert Scientific Lab, Lima.
XCREST is a pelvic procedure. It is often discussed alongside rib remodeling because both address the waist at the skeletal level, but they treat different bones, at opposite ends of the waist, with different risks.
RIBXCAR narrows the waist from above by changing the angle of the lower ribs. FRONTXRIB does the same at the front. XCREST lengthens the waist from below. Do not assume that what is true of one is true of the others — particularly regarding risk, which we set out separately.
Origin
XCREST was developed by Dr. Raúl Manzaneda Cipriani in Lima, Peru, founder of AX — Aesthetic Xpert Scientific Lab, and described by him in the Aesthetic Surgery Journal in 2025.[1] Dr. Higuchi performs it as AX Asia Ambassador.
Unusually for an aesthetic procedure of this age, it arrived with a peer-reviewed outcome series of 200 patients attached. That does not make it risk-free, but it does mean the conversation about it can be conducted with numbers rather than impressions.
Rationale
The usual answer to an abrupt waist-to-hip transition is to add fat around the hip. It is the less invasive option and for many patients it is the right one. But it is worth understanding what it does when the underlying issue is skeletal.
Fat transferred above the gluteus medius volumizes that muscle. The buttock becomes higher and larger — which is a bigger version of the existing proportion rather than a different one, and is not always what was wanted.[1]
If the crest sits high, adding volume above it raises the whole assembly. Reducing the crest changes the proportion itself: the vertical space between the last rib and the pelvis increases, and the transition from waist to hip has somewhere to happen.
The iliac crest is not decorative bone. It is the insertion point for a number of muscles, ligaments and fasciae, and that is precisely why reducing it is a real operation with real consequences rather than a contouring adjustment. It is also why patient selection matters more here than technique enthusiasm.
Evidence
From a study of 200 female patients, with measurements taken before surgery, immediately afterwards, and again at six months.[1]
| Measure | Finding |
|---|---|
| Mean waist, before surgery | 83.11 cm |
| Mean waist, immediately after | 72.31 cm |
| Mean waist, at six months | 72.06 cm — the change held rather than relapsing |
| Distance, lowest palpable rib to crest | Increased by an average of 3.8 cm |
| Complications | 10 per cent of patients had pain-related complications lasting less than two months, which were treated |
These are averages across a study population authored by others. They do not describe results at this practice and are not a prediction of your individual outcome. Your own change depends on where your crest sits to begin with, on your soft tissue, and on your proportions.
Two things in that table are worth reading carefully. The first is the six-month figure: the waist measured 72.31 cm immediately after surgery and 72.06 cm half a year later. Skeletal change does not settle back the way soft-tissue change can. The second is the 3.8 cm: that is the number that describes what the operation actually does. The waist is not squeezed. It is given room.
A related technique in the same group addresses the deep fat beneath the crest under ultrasound guidance, for the same waist-to-hip region.[2] Bone and soft tissue are usually planned together rather than in isolation.
Candidacy
Whether your crest is genuinely high is measured, not eyeballed: the vertical distance from the lowest palpable rib to the crest, and the crest-to-trochanter distance, are recorded at examination. If those numbers do not support the operation, you will be told so.
The Operation
Recovery
This is the honest headline difference from liposuction recovery. After soft-tissue contouring the dominant experience is swelling and tightness. After crest reduction it is pain and restricted movement, because the operated bone is where the muscles that move your hip and trunk insert.
Exercise involving the hip and trunk — running, loaded squatting, twisting sports — is reintroduced on your surgeon’s timetable rather than yours. If your season, competition or physical work cannot accommodate that, the operation should wait rather than the recovery being compressed.
Fees
| Item | Fee (JPY, incl. tax) |
|---|---|
| XCREST — iliac crest reduction | ¥2,200,000 |
| General anaesthesia | ¥165,000 |
| Standard set (anaesthetic, medication, compression garment) | ¥66,000 |
| Blood tests | ¥11,000 |
Liposuction or fat grafting performed alongside is quoted separately — see the full fee schedule. Standard prices, not monitor prices. Your written quotation is the binding figure.
As with the other skeletal procedures, this is not covered by the one-year guarantee that applies to VASER liposuction, VASER 4D, Condense Rich breast augmentation and gynecomastia surgery.
Risks
Elective surgery on the pelvis. Not covered by health insurance in Japan; outcome cannot be guaranteed.
Questions
The iliac crest is the upper border of the pelvis — the bone you feel when you rest your hands on your hips. When it sits high, the gap between it and your lowest rib is short, so the waist has little vertical room to curve in and the change from waist to hip happens abruptly rather than as a transition. It is a skeletal proportion, which is why neither training nor liposuction changes it.
In the published series of 200 female patients, the mean waist measurement fell from 83.11 cm before surgery to 72.31 cm immediately afterwards and 72.06 cm at six months, and the average distance between the lowest palpable rib and the iliac crest increased by 3.8 cm. Those are averages from a study population, not a prediction for you — your own result depends on where your crest sits, your soft tissue and your proportions.
Because of where the fat lands. Grafting above the gluteus medius volumizes that muscle, which tends to produce a high, large buttock — a bigger version of the same proportion rather than a better one. If the underlying issue is that the crest sits high, adding volume above it does not create the transition you were looking for. Reducing the crest addresses the proportion itself.
No, and it is important not to transfer one to the other. Rib remodeling works next to the pleura, which is why its serious complications are thoracic. XCREST works on the pelvis, where there is no lung to injure. Its trade-offs are different: the crest is an insertion point for muscles, ligaments and fasciae, and the reported complication in the published series was pain — 10 per cent of patients, resolving within two months, and treated.
They are complementary: rib remodeling narrows the waist from above, XCREST lengthens it from below. Whether both should be done in a single operation is a safety decision — operative time and recovery capacity — rather than a matter of preference, and it is made at consultation.
The surgical fee is ¥2,200,000 including tax. General anaesthesia, the standard post-operative set and blood tests are additional. Where liposuction or fat grafting is performed alongside it, that is quoted separately.
Plan for at least two weeks after surgery. That period covers early recovery, compression management and at least one in-person follow-up before you are cleared to fly. Your arrival date before surgery is set separately in your written plan.
XCREST was developed by Dr. Raúl Manzaneda Cipriani in Lima, Peru, founder of AX — Aesthetic Xpert Scientific Lab, and described by him in the Aesthetic Surgery Journal in 2025. Dr. Higuchi performs it as AX Asia Ambassador.
References
Retrieved from PubMed.
Next
It is a measurement, and it is the first thing to establish — because if the answer is no, this operation has little to offer you and considerable to ask. The consultation is held online, in English, before you commit to travel.