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Avascular Necrosis (AVN) Stem Cell Therapy in Istanbul

How our medical team stages avascular necrosis on MRI, what an image-guided plan involves, and how to send your hip or knee scans for review.

Illustrative film moving from a patient in warm daylight into a golden ribbon of light and on to a porous lattice of trabecular bone threaded with fine microvessels. Biology in context

Understanding Avascular Necrosis (AVN)

Avascular necrosis is what happens when the blood supply to a segment of bone is interrupted and the bone just beneath a joint surface begins to die. Reports may call it osteonecrosis, aseptic necrosis or ischaemic necrosis, and the femoral head of the hip is by far the most common site, followed by the knee, the shoulder and the ankle. Radiologists stage it - the ARCO and Ficat systems appear on most reports - and the line everyone is watching for is subchondral collapse, the point at which the bone under the cartilage loses its shape. Early on it is often quiet, then it becomes a deep groin, buttock or knee pain that arrives with weight-bearing, wakes you at night and steadily shortens how far you can walk before you have to sit down. Many people are also told they are too young for a joint replacement and asked to wait, which is usually what sends them looking for something else.

What separates avascular necrosis from ordinary joint wear is that the trouble starts inside the bone and in its blood supply rather than on the cartilage surface, so what an MSC treatment is aimed at here sits deeper: the signalling environment of the marrow in and around the necrotic segment, the angiogenic signals involved in forming new small vessels, and the bone-forming cells that live alongside them. That is why work in this condition has centred on placing cells into the lesion itself, often together with core decompression, rather than into the joint space above it. Our program works with mesenchymal stromal cells from Wharton's jelly, the gelatinous tissue inside a donated umbilical cord, and that source suits this target well: a young perinatal material rather than marrow borrowed from an ageing skeleton, cells that expand readily in culture so a batch is characterised and release-tested before anything reaches you, and above all a strong secretory profile, since the signals these cells release are the property this research follows. Influence on that environment is what is described - not the rebuilding of a femoral head that has already flattened, and our team keeps those two ideas firmly apart.

Our medical team starts with the MRI, because plain X-rays stay normal in early disease and only MRI shows the lesion, its size, how much of the weight-bearing dome it involves and whether the marrow around it is still reacting. We ask directly about the causes - corticosteroid courses, alcohol intake, sickle cell disease, a previous fracture or dislocation, radiotherapy, chemotherapy, decompression sickness - because some of them are still acting and need addressing whatever else is planned. Where imaging shows a collapsed or flattened head, a loose fragment or established secondary arthritis, the more useful conversation is an orthopedic one about decompression, grafting or replacement, and we will say so plainly rather than offer an injection instead. Where a plan is appropriate, the aim may focus on pain with weight-bearing, walking distance and night pain, scored before treatment and again at agreed review points, with imaging repeated to restage. Send your hip or knee MRI together with the radiology report, and our medical team will tell you which of those two conversations yours is.

How Avascular Necrosis (AVN) Can Affect Daily Life

Symptoms, severity and progression vary from person to person. Our medical team uses this kind of detail as context for your case review; it is not a diagnostic checklist. Diagnosis, and any change in your symptoms, belong with the clinician who knows your medical history.

  • Deep groin, buttock or knee pain that arrives with weight-bearing
  • Pain at rest and at night once the lesion is more advanced
  • A limp, a shortening stride and a walking distance that keeps falling
  • Stiffness and loss of rotation in the affected hip
  • A sudden step up in pain, which can mark the point of collapse

Avascular necrosis follows the blood supply

Avascular necrosis begins with circulation rather than with cartilage. This visual follows the vessels that feed the femoral head, the bone that depends on them, and the staging our medical team reads from your MRI.

Cutaway hip illustration showing a wedge of dead bone in the femoral head, the vessels feeding the femoral neck, collapsed trabeculae, a limping gait and MRI review

Clinical context

Microscopic editorial illustration of cartilage, connective tissue matrix, and cell research

Microscopic research viewIllustrative detail

An illustration of the hip in avascular necrosis: the wedge of bone in the weight-bearing part of the femoral head that has lost its blood supply, and the fine vessels along the femoral neck that supply it. Research interest here lies in inflammatory and angiogenic signaling in the bone around that area. The view then moves in to connective tissue, the matrix around it, and the cell research done there. Both frames are illustrations of the biology, not footage of a patient or a laboratory result, and this visual does not depict a treatment outcome.
The vessels that feed the head
The femoral head is supplied by a small number of vessels running along the neck, which is why an interruption shows up as bone loss so quickly.
Stage before plan
MRI staging, the size of the affected segment, and whether the joint surface has begun to flatten change the conversation entirely.
Function in daily life
Groin pain, walking distance, stairs, night pain and the limp others notice describe the hip better than imaging alone.

Why Regenerative Medicine Is Being Studied in AVN

These are the biological mechanisms researchers are investigating. A mechanism is a reason to study a treatment, not a promise of benefit for an individual patient. Our medical team will explain how much of this research applies to your own diagnosis.

  • In avascular necrosis the target is inside the bone: the signalling environment of the marrow in and around the necrotic segment, not the cartilage surface above it
  • Angiogenic signalling - the messages involved in forming new small blood vessels - is the part of MSC biology this condition leans on most
  • Where it is indicated, delivery is intraosseous under fluoroscopic guidance, planned as an adjunct to surgical core decompression rather than as a replacement for it
  • Influencing the environment inside a lesion is a different claim from rebuilding bone that has already collapsed, and the two are never presented as one
  • Staging decides the plan: pre-collapse and post-collapse disease lead to different recommendations, and the MRI is read rather than the stage alone
  • Weight-bearing pain, night pain and walking distance are scored before treatment and at set intervals, with imaging repeated to restage

Research maturity

What the Research Currently Shows for AVN

How far published research has travelled for each approach, from laboratory work through to established standard care. It describes the maturity of the evidence, not how well any option works and not what to expect in an individual case.

  1. 01Laboratory and animal work
  2. 02Early human studies
  3. 03Controlled trials under way
  4. 04Established standard of care
  • Core decompression, offloading and total joint replacement in collapse stages

    Standard orthopaedic management staged by subchondral integrity and femoral head sphericity on MRI.

    Established standard of care

  • Core decompression combined with cellular or MSC grafting

    Randomised and comparative studies in pre-collapse osteonecrosis examine bone repair when cells augment surgical decompression, before subchondral collapse occurs.

    Controlled trials under way

An editorial summary of published research maturity, not a measure of benefit for an individual patient. Levels change as studies are published.How to read the evidence

Your case review

How Our Medical Team Reviews Your Case

Your review starts with the confirmed diagnosis, recent reports and imaging, current treatment, medical history, and the outcome that matters most to you. Not everyone is suitable for regenerative medicine, and our team will say so when the care you already receive is the better route.

  • An MRI of the affected joint with its report, since early avascular necrosis does not appear on X-ray
  • The stage recorded on that report - ARCO or Ficat - with the size of the lesion and how much of the weight-bearing area it involves
  • Causes and risk factors documented: corticosteroid courses, alcohol intake, sickle cell disease, previous fracture, radiotherapy or diving history
  • Any previous core decompression, bone grafting or fixation, with operative notes and the imaging that followed
  • Goals named by you: standing tolerance, walking distance, night pain or managing a flight of stairs
  • An orthopedic opinion where the joint surface has collapsed or secondary arthritis is established, which is the more useful route

How Treatment for AVN Is Planned at Our Istanbul Clinic

The path international patients follow with us, from the first review of your records to follow-up after you return home. The exact steps depend on what your medical review finds.

Send your medical records

Recent reports, imaging, your current medication, and what you hope treatment will help with. It lets our medical team make the review specific to you.

Start your case review
  1. Send your medical records

    Your case review starts with the confirmed diagnosis, recent reports and imaging, current medications, previous procedures and the outcomes that matter most to you. Everything can be sent digitally from home, long before travel is discussed.

  2. Case review by our medical team

    Our medical team reads the file against your diagnosis, disease stage, imaging, laboratory results, current treatment and any contraindications, then decides whether regenerative medicine is appropriate for you and which goals are realistic to discuss.

  3. Your written treatment plan

    When treatment is appropriate, you receive the plan in writing: the cell material and how it is prepared, the dose, the route of administration, the number of sessions, the monitoring involved and an itemized cost with no assumed extras.

  4. Your treatment in Istanbul

    On arrival our team repeats the checks that matter for your case, confirms the plan with you, and carries out treatment under medical supervision with an observation period afterwards. Your coordinator handles scheduling, timings and what each day involves.

  5. Follow-up and monitoring

    Before you fly home we agree what will be measured, when it will be reviewed and how to reach us. Follow-up continues remotely and can be shared with your own doctors, so your treatment plan and your local care stay aligned.

Your treatment plan

What Our Medical Team Explains Before You Decide

"Stem cells" and "exosomes" name a category, not a specific product. What matters in your plan is the source of the material, how it was prepared, the route and the dose, the clinical setting, and why you were considered suitable. Our medical team sets each of those out for the treatment being proposed to you.

We plan treatment alongside the care you already receive, so keep your own clinician involved and record a clear baseline before you travel. For the practical side, read the Istanbul treatment trip guide and the cost guide, then ask us for an itemized estimate.

  1. Which published research applies to your diagnosis and to the route we propose.
  2. Where the biological material comes from, how it is prepared, and how it is documented.
  3. The possible side effects and the contraindications that apply to your procedure.
  4. Which functional outcome is measured before treatment and again at follow-up.
  5. How treatment sits alongside your existing care, including the option of not treating.
  6. Who to contact about follow-up, or about a complication, once you are home.
  7. What your estimate includes and excludes, and what is due before you travel.

Next step

Start with a medical case review

Send your diagnosis, recent reports, imaging and current medication, and tell us what you want treatment to help with.

Request a Medical Case Review

Avascular Necrosis (AVN): Questions Patients Ask Us

What does avascular necrosis treatment cost in Turkey?

Every part is itemized rather than bundled: the imaging review, whether one joint or two are covered, the route of administration, fluoroscopic guidance, sedation, theatre time where core decompression is part of the plan, and the imaging arranged at review. Our patient coordination team sends that breakdown in writing, with the clinical reason beside each line, before you commit to travel.

Can this regrow the dead bone in my hip?

Rebuilding a segment of bone that has already collapsed is not what this research describes, and our medical team will not suggest otherwise. Once the subchondral bone has lost its shape, the joint surface above it is mechanically different and that is an orthopedic problem rather than a signalling one. Work in avascular necrosis centres on the pre-collapse setting, where there is still viable bone around the lesion to work with, and the goals we write down are about weight-bearing pain, walking distance and sleep.

Does the ARCO or Ficat stage on my report change what is possible?

It changes the whole conversation. Early disease, where the bone under the cartilage is still intact, is the setting this work is built around and where our medical team will look hardest at a plan. Once the dome has begun to flatten or collapse, the honest route is an orthopedic opinion about grafting or replacement. Our team reads the MRI itself rather than working from the stage alone, because lesion size and how much of the weight-bearing dome is involved matter just as much as the number on the report.

How long is the stay in Istanbul for avascular necrosis treatment?

Your plan states it before you book flights: the assessment day, the procedure itself, the observation period afterwards, the weight-bearing restrictions for the days that follow and the point at which our team is comfortable with you flying. A procedure that places material into bone carries more restriction than a simple joint injection, so the stay is planned around that rather than around a return ticket booked in advance.

Are Wharton's jelly stem cells used to treat Avascular Necrosis (AVN) in Istanbul?

Yes. Our regenerative medicine program works with mesenchymal stromal cells (MSCs) grown from Wharton's jelly, the gelatinous tissue inside the umbilical cord. It is donated after a healthy birth with written maternal consent, from tissue that would otherwise be discarded, so nothing is taken from mother or baby and none of the ethical questions attached to embryonic sources arise. Because these cells expand readily in culture, a batch is characterised and release-tested before it reaches anyone. Your written plan names the material, how it is prepared, the dose, the route of administration and the schedule, and our medical team explains why each of those was chosen for your case.

Why use donor cells from Wharton's jelly rather than my own cells for Avascular Necrosis (AVN)?

Wharton's jelly is a young, perinatal tissue rather than an adult one, so the starting material does not carry the age or the health history of the person being treated, and nothing has to be harvested from you on the day. These cells also have a low-immunogenicity profile, which is why this source is studied for use between unrelated people. Most of all, they are strong secretors: the signalling molecules MSCs release are the mechanism most current research centres on, and that is what a plan is built around.

How long do international patients stay in Istanbul for Avascular Necrosis (AVN) treatment?

The length of stay follows your plan: the route of administration, the number of sessions, the monitoring after each one, and any mobility or assistance you need. Our patient coordination team confirms appointment dates, daily timings and the expected length of the visit in writing before you book flights.

Is stem cell therapy for Avascular Necrosis (AVN) safe?

No medical procedure is free of risk. Our medical team screens for infection, bleeding risk, medication interactions and other contraindications before treatment, explains the risks specific to the route used in your plan, and monitors you during administration and afterwards. If something makes treatment unsafe for you, we say so instead of proceeding.

What can stem cell therapy realistically aim for in Avascular Necrosis (AVN)?

Goals are set with you and described as aims, not results. Regenerative medicine treatments are planned individually, responses vary between patients and no clinical outcome can be guaranteed. Your plan states what will be measured, when it will be reviewed, and how treatment sits alongside the care you already receive.

How do I start a Avascular Necrosis (AVN) case review from outside Turkey?

Send your confirmed diagnosis, recent reports and imaging, your current medication list, previous procedures and the goals that matter to you. Our medical team reviews them remotely and comes back with an assessment of whether treatment in Istanbul is appropriate for your case, and what the next step would be.

Medical Disclaimer: Information on this page is educational and is not personal medical advice. Regenerative medicine treatments are planned individually, responses vary and no clinical outcome can be guaranteed. Some of the approaches described remain investigational. Suitability is confirmed only after medical review, and treatment is planned alongside your existing care.

Wide sunrise view from Istanbul's Asian shore with a ferry and the historic peninsula across the water

Sunrise from Istanbul's Asian shore, looking across the water. It shows the city you would travel to, not our clinic, your accommodation, or a service included in a plan.

Plan for movement and access with AVN

We go through walking limits, stairs, vehicle transfers, mobility aids, companion support, and a realistic return journey before an Istanbul visit is booked.

More from our clinic

Planning treatment for AVN in Istanbul

The practical side of treatment at our clinic: what the research shows, who may be suitable, what a plan costs, and how your stay in Istanbul and your follow-up are arranged.

Cost, Outcomes & Istanbul

International patient support

Ask our medical team about treatment for Avascular Necrosis (AVN).

Send your diagnosis, recent reports, imaging and current medication. Our medical team reviews them and explains which regenerative medicine options may fit your case, and what treatment in Istanbul would involve.

Your review starts from home

Nothing needs to be booked to begin. Our patient coordination team plans your visit to Istanbul once your treatment plan is agreed.