Phalloplasty
Reconstructive Penile Construction: RFF vs ALT Flaps (Gender-Affirming & Trauma)
Evidence grade 3 of 5, Mixed. Read how the Atlas grades evidence.
The written rationale for this grade is still being prepared.
- FDA
- Reconstructive surgery (not a regulated device); standard of care in selected gender-affirming and trauma cases
Reference only. Not medical advice.
What can go wrong
Urethrocutaneous fistula and urethral stricture are the most common complications and frequently require revision surgery. Other risks: partial or total flap loss/necrosis (microsurgical failure), donor-site morbidity (forearm graft, reduced grip/sensation for RFF), wound healing problems, and the added complication profile of a later penile prosthesis. This is high-burden surgery best concentrated in experienced centers.
This is something to take to a clinician. The Atlas can tell you what is known about phalloplasty in general. It cannot tell you what is happening in your body, and the difference matters most for exactly the symptoms that bring people to this page.
Phalloplasty constructs a neophallus from a tissue flap, used for gender-affirming surgery, traumatic/oncologic loss, or congenital absence. It is fundamentally different from cosmetic enlargement: it is staged, microsurgical, and reconstructive. The two main donor flaps are the radial forearm free flap (RFF), the gold standard for sensation and urethral lengthening but with high donor-site morbidity and visible scar, and the anterolateral thigh (ALT) flap. Complication rates are high by design: urethral fistulas and strictures are the dominant problems, and most patients need more than one operation to achieve standing micturition and (optionally) erectile rigidity via a prosthesis.
Building a phallus from a flap, the most complex genital surgery, with a high complication tax.
What people take it for
These are the reasons people give for taking it. They are not effects it has been shown to have.
How it is supposed to work
A flap of skin (and sometimes fascia/nerve) is harvested, tubularized to form the shaft and often a 'tube-within-a-tube' for the neourethra, and microsurgically anastomosed to recipient vessels and nerves. Standing urination requires connecting the new urethra to the native one; erectile rigidity, if desired, comes later from an implanted penile prosthesis, not from the flap itself.
Safety in detail
Major multi-stage microsurgery with high baseline complication rates (urethral fistula/stricture, possible flap loss) and donor-site morbidity. Outcomes are strongly center- and surgeon-dependent. This is reconstructive, not cosmetic enlargement.
What people get wrong
Often saidPhalloplasty is cosmetic enlargement
ActuallyIt is reconstructive construction of a phallus, not enlargement of an existing one; goals are urination, sensation, and appearance.
Often saidIt is one operation
ActuallyIt is typically multi-stage, and urethral complications often add unplanned procedures.
Who profits, and who pushes back
Nobody is named here yet, because we have not done that work on this entry. Read that as unfinished. Somebody almost certainly sells this, and somebody almost certainly disputes it. Assume both until we have checked.
Set against the alternatives
RFF offers the best protective/erogenous sensation and reliable urethral length but leaves a conspicuous forearm donor scar and graft. ALT avoids the visible forearm and gives more bulk but has less consistent sensation and urethral outcomes, often needing a separate urethral construction. Reported series show RFF with high urethral complication burden, fistula and stricture each affecting a substantial minority to majority of patients depending on technique and surgeon volume.
| Radial forearm (RFF) | Best sensation, reliable neourethra | High fistula/stricture rates; visible forearm scar | Gold standard, high complication tax |
|---|---|---|---|
| Anterolateral thigh (ALT) | Hidden donor site, more bulk | Less consistent sensation; urethra often staged separately | Common alternative |
| Urethral fistula | Most frequent complication overall | Reported widely across series; often needs revision | Expected, manageable |
| Urethral stricture | At pars fixa/pendulans junction | Reported in a wide range across series | Expected, manageable |
What we do not know
- Which flap/staging strategy minimizes urethral complications long-term?
- How much does surgeon/center volume change complication rates?
At a glance
- Main flaps
- Radial forearm (RFF) vs anterolateral thigh (ALT)
- Stages
- Typically multi-stage
- Dominant complications
- Urethral fistula and stricture
- Rigidity
- Requires a separate penile prosthesis
What this entry does not yet cover
What follows is unfinished work on our side, not a finding about Phalloplasty. A short entry is not a safe entry.
- Timeline. We have not built the dated record of research and regulatory events.
- Cost and market. We have not documented what it sells for or who sells it.
- Supply chain. We have not mapped where it is made.
- Who uses it. We have not documented the user groups.
- What could change. No forward-looking summary yet.
- Children and teenagers. We have not checked what is known about younger people.
Sources
The studies below are named and described, but not linked. You cannot open them from here and check our reading against them, which means this page is our summary of the literature rather than a document you can verify. Weigh it accordingly until the links exist.
The studies that matter
Flap choice in gender-affirming phalloplasty affects complication rates, PMC cohort2020s
Retrospective cohort: RFF highest overall complication rate, with substantially higher fistula and stricture rates than ALT in that series
Reviews of urethral complications after RFF phalloplasty, Int J Reconstr Urol2025
Fistula and stricture are the leading urethral complications; rates vary widely with technique, staging, and surgeon experience