Radial Forearm (RFF) Phalloplasty
Radial forearm free flap phalloplasty, usually shortened to RFF, builds the penis from the inner forearm of your non-dominant arm. A rectangle of skin, fat, nerves and blood vessels is lifted off it. The flap is rolled into a tube, moved to the groin, and its artery, veins and nerves are joined under a microscope to vessels and nerves there. "Free flap" means exactly that. The tissue is fully detached and reconnected, which is what makes it the most demanding of the phalloplasty techniques and the one with the longest track record.
It is the flap most surgeons reach for first, and the reason is the tissue. Forearm skin is thin, pliable and well supplied with nerves. It rolls into a shaft of natural size, takes sensation better than any other donor site, and makes the best urethra. Everything you read about phalloplasty outcomes is mostly RFF data.
The price is paid on the forearm. A skin-grafted patch covers most of the inner arm, from wrist to near the elbow. It is visible for life to anyone who sees you in short sleeves.
Add months of weaker grip in that hand. I have watched a lot of people weigh that, and it is the thing they most often say they were not fully prepared for. Nobody regrets the sensation. Plenty are surprised by the arm.
At a glance
- Also known as
- RFF, RFFF, radial forearm free flap phalloplasty, forearm phallo, Chinese flap
- Stages
- 2–3, plus implants if wanted
- Surgery time
- 8–12 hours (stage 1)
- Anaesthesia
- General
- Hospital stay
- 5–7 nights (stage 1)
- Back to work
- 6–8 weeks after stage 1
- Full recovery
- 12–24 months across all stages
- Scar
- Skin-grafted patch on the inner forearm, wrist to near the elbow, permanent
- Sensation
- Best of the flaps; touch along the shaft in most people by two years
- Typical cost
- $50,000–$150,000 all stages (United States, self-pay)
- Usually preceded by
- Hysterectomy, Vaginectomy
Figures reviewed .
On this page
Who it’s for
Someone who wants the best-documented result in phalloplasty, meaning sensation you can count on and a urethra built from the tissue best suited to it. And who can live with a forearm that permanently shows the work. If the arm is the deal-breaker, the thigh, back and abdominal flaps exist for you, at some cost in feeling, bulk or function.
Your forearm has to be suitable. Surgeons look for enough skin to roll a shaft of the length they are aiming for. The forearm has two main arteries. The radial one goes with the flap, so they check that the other, the ulnar, can keep the hand supplied on its own; the Allen test at consultation, a quick squeeze-and-release of the wrist, is for this. Any injury, surgery or blood vessel disease on that side rules it out.
Very slim, very small or very hairy forearms make it harder. If the urethra is coming from the flap, hair removal on the forearm has to be finished before stage one. If your work or identity depends on that arm, from music to the trades to climbing, ask hard questions about grip and wrist function before choosing it.
Most surgeons want a hysterectomy done first, and a vaginectomy with it if the urethra is being lengthened. You need to be settled on testosterone and within your surgeon's BMI range. Nicotine is stopped completely for months either side, because a free flap lives or dies on vessels a millimetre wide. See eligibility.
Before you book
Wear a short-sleeved shirt for a day and look at your inner forearm every time it catches your eye. Picture the grafted patch there, on that arm, for good. If you can shrug at it, you're a candidate. If you can't, one of the other flaps deserves a proper look before you decide.
How it’s done
Two teams usually work at once. On the arm, one surgeon marks a rectangle on the inner forearm and lifts it. The radial artery, its veins and two forearm nerves stay attached at the wrist end.
If the urethra is coming from the same flap, they roll a narrower hairless strip inwards to make the urethral tube. The wider part is wrapped around it to make the shaft. The result is a tube within a tube, shaped and stitched while it still has its own blood supply.
In the groin, the other team prepares the site. They bring the existing urethra forward, free the clitoris with its nerves intact, and do the scrotoplasty if it is planned for this stage. Then the flap comes off the arm and the microsurgery begins.
The radial artery is joined to an artery in the groin, the veins to veins, and the forearm nerves to the clitoral nerve and a groin nerve. The clitoris is buried at the base of the new shaft, still connected, so the erotic sensation you already have carries on. The urethral tube is joined to the lengthened original urethra.
Last, the forearm. The wound is covered with a thin shaving of skin taken from the thigh (a split-thickness skin graft), dressed, and put in a splint. Some surgeons build the urethra at this stage, some delay it. Glansplasty, which shapes the head, is usually a second stage months later, and erectile implants come last, only once the shaft can feel.
The months before
Start the forearm hair removal early and keep every session. It has to be finished before the arm can be used, and a course that runs late is the most common reason a stage one date moves.
RFF phalloplasty recovery
The first days are the flap watch. You are in bed, warm, with a nurse checking the colour and pulse of the new phallus every hour, and the arm and thigh dressed and elevated. It is boring and tense in equal measure. Most people say the fear of the first week is worse than the pain. The thigh graft site, oddly, hurts more than the arm or the groin.
Then a fortnight of moving slowly, with a catheter if the urethra was lengthened. The first attempts to pee are the moment everyone is holding their breath for. The arm comes out of its splint after a few weeks and starts physiotherapy.
Grip is weak and the wrist stiff for months, and you learn how much you used that hand without noticing. Lifting with that arm comes back last. The shaft is numb for the first months until the nerves grow in.
| Days 0–5 | In hospital, mostly in bed. Hourly flap checks. Arm and thigh dressed and elevated; catheter in. |
|---|---|
| Week 1 | First dressing changes. Standing and short walks. Thigh graft site at its most sore. |
| Weeks 2–4 | Home. Splint off at the surgeon's call; hand physio starts. Catheter out at three to four weeks; first attempts to pee watched for leaks. |
| Weeks 6–8 | Desk work realistic. Forearm graft settled but tender. Grip well below normal. |
| Months 3–6 | Full activity except heavy lifting with that arm. Tingling in the shaft as nerves grow in. Any fistula or stricture usually shows by now. |
| Months 6–12 | Second stage for glansplasty and revisions. Grip near normal for most. Shaft sensation building. |
| Months 12–24 | Sensation close to its final level. Erectile and testicular implants considered once the shaft can feel. |
In the first month
Set your home up for one-handed living before you go in. Jar lids, taps, a bag with a shoulder strap, clothes you can pull on without a strong grip. You will be doing everything with your dominant hand for a while, and the other one hurts when you forget.
RFF phalloplasty scars
Two donor scars and one you came for. The forearm is the one that matters. A rectangular grafted patch on the inner surface, often ten centimetres wide and running from the wrist to within a few centimetres of the elbow.
It heals paler or darker than the skin around it, slightly sunken, with a shiny grafted texture that does not match the rest of the arm. It is permanent and it does not fade the way an incision does. Some people tattoo over it once it has matured; some wear a sleeve; most simply stop noticing and let other people ask.
The thigh, where the graft was taken, heals like a large graze and fades to a faint flat patch over a year or two. The groin and shaft scars sit along the underside and at the base and are the least of your concerns.
Sensation after RFF phalloplasty
This is what you are buying. The forearm carries two sizeable sensory nerves, and once they are joined to the clitoral and groin nerves the shaft slowly wakes up. Nothing for the first months. Then tingling and a protective sense of pressure from around six months.
Then touch along most of the shaft in the majority of people by two years. Erotic sensation comes mainly from the buried clitoris, which never lost its nerves, and it is there from the start once the swelling goes down.
Published series consistently put RFF ahead of every other flap on this, and it is why surgeons still offer it despite the arm. The honest range is wide, though. A minority get little tactile feeling in the shaft. And the forearm itself is left with a numb strip along the thumb side of the hand and wrist in many people.
Risks and complications
The one that keeps surgeons up at night is the flap losing its blood supply in the first days. The cause is a clot in the joined artery or vein. It is uncommon in experienced hands, with total loss reported at a few percent and partial loss somewhat higher. But it means an emergency return to theatre and, in the worst case, losing the phallus. That is why you are checked hourly and why nicotine is an absolute rule.
Urethral trouble is common rather than rare. A fistula is where urine leaks through a hole in the new tube; a stricture is where it narrows. Together they affect somewhere between a quarter and half of people in published series.
The join between the new and original urethra is the usual spot. Most are fixed with a further procedure, and it is the main reason RFF is counted in stages rather than operations. Hair inside the urethra, if the forearm was not cleared, causes stones and infections for years.
The forearm has its own list. The graft not taking, or slow healing over the tendons. Reduced grip and wrist strength, permanent in a minority. A hand that aches in the cold, a numb patch near the thumb, and a hand that swells for months. Then the general risks of a long operation, including clots, infection and wound breakdown at the groin.
RFF phalloplasty results
At a year or two, a penis of roughly 12–16 cm depending on the forearm. It has a natural taper and a girth that clothes cannot tell from anything else. The shaft feels touch and the base feels erotic sensation. Most people who had the urethra built are standing to pee once any fistula or stricture has been dealt with. It hangs soft unless an implant is added, and the implant is what makes penetrative sex possible.
What disappoints tends to be size when the forearm was small. Colour and texture on the shaft, too, which stays a little paler and smoother than groin skin. And the arm, which always looks like more than people pictured from the photos.
Alternatives to RFF phalloplasty
The choice between flaps is the choice of where you pay. If the forearm scar is what stops you, anterolateral thigh hides the donor site under shorts at the cost of bulk and less reliable sensation. MLD from the back gives size with less feeling, and abdominal is the simplest and lowest-risk with no shaft sensation and no urethra. If a full-sized phallus is not the point, metoidioplasty avoids a donor site altogether.
If sensation and standing to pee are what you want most, and you can make peace with the arm, RFF is still the flap with the most evidence.
Anterolateral Thigh (ALT) Phalloplasty
An ALT phalloplasty builds the phallus from a flap of front-outer thigh, usually swung into the groin on its own vessels. The donor scar sits under shorts. The price is a bulkier phallus, a urethra that has to come from elsewhere, and less reliable sensation than a forearm flap.
Best for: people with lean thighs who cannot accept a forearm scar, especially if standing to pee is not the priority
Read more: Phalloplasty
Combining RFF phalloplasty with other surgery
Stage one is almost always combined with the vaginectomy, scrotoplasty and urethral lengthening in one long operation. Some surgeons split the urethra off into its own stage to protect the flap. The hysterectomy is usually done separately, months earlier, so the pelvis has healed, though some programmes fold it into stage one. Glansplasty, implants and any revisions each get their own day. See surgery order.
RFF phalloplasty cost
The quote you are given is almost never the whole thing. RFF is priced as stage one, and stage one is the expensive part. But glansplasty, implants, any fistula repair and hair removal on the forearm each arrive as separate bills. Ask what the number covers and what a fistula repair costs if you need one, because at published rates a fair share of people do.
Hospital nights are what move the total. A week in a bed with hourly flap checks is a large part of any RFF quote. It is the reason a hospital-based programme costs more than a surgeon's fee suggests.
| Country | Self-pay | Public / insurance |
|---|---|---|
| United States Stage one alone often $40,000–$80,000 with hospital fees; implants, glansplasty and revisions billed separately | $50,000–$150,000 all stages | Covered by many plans and Medicaid in some states with letters of support; long approval process |
| Thailand Few surgeons offer RFF; plan 4–6 weeks in Bangkok for stage one, and return trips for later stages | $25,000–$50,000 all stages | Self-pay only for international patients |
Choosing a RFF phalloplasty surgeon
RFF is microsurgery, and the flap survives or does not on the quality of the vessel joins. The two numbers I would ask for are how many RFF phalloplasties they do a year and their total flap loss rate. I would want the second answered without hesitation. Then ask their fistula and stricture rate for the whole sequence, not just stage one, because that is where most of your later surgery will come from.
In photos, ask to see the forearm at a year alongside the phallus. Then ask to see a result where something went wrong and how they handled it. Every surgeon I have put that question to who does this well has answered with a plan, not a reassurance. The one who says it never happens is the one to worry about.
At the consultation
Ask "who watches the flap overnight, and what do they do if it changes colour?" You want a named person and a plan with the word "theatre" in it. That answer tells you more about the programme than any gallery.
Frequently asked questions
What will my arm look like afterwards?
A rectangular grafted patch on the inner forearm, permanent and visibly different from the skin around it. See scars.
Will I get my grip back?
Most people get close to normal strength over several months of physio, with some stiffness and cold sensitivity in the wrist. A minority are left weaker for good. See risks.
How long until the phallus has feeling?
Tingling from around six months and touch along the shaft in most people by two years. Erotic sensation from the buried clitoris is there far sooner. See sensation.
Do I have to have hair removal on the forearm first?
If the urethra is being built from the flap, yes. It has to be complete before stage one, which takes a course of sessions spread over months. For the outer shaft it is optional, though most people do it.