Rigottomy Release Mechanics: Why the Cuts Must Not Join Up

Percutaneous release is a deceptively simple manoeuvre with one difficult constraint: the releases must not join up. Everything that distinguishes a well-executed rigottomy from a counterproductive one follows from that.

This article is about the mechanics — what the release is doing to the tissue, why the pattern matters more than the number of passes, and how the commonest technical error produces precisely the complication the technique exists to prevent.

What is being released

A fibrous or scarred recipient bed is not simply dense; it is tethered. Fibrous septa and a contracted aponeurotic layer hold the tissue as a plate, resisting expansion in every direction and leaving no interstitial space for a graft to occupy. Fat injected into such a plate has nowhere to distribute to. It follows the path of least resistance, which is usually a single plane, and collects.

Release divides those bands through needle-sized skin punctures, without an open incision. The tissue that was a plate becomes a lattice.

Two features of the third panel carry the whole technique. The cavities are numerous, so there is a large internal surface area in contact with released, vascularised tissue. And they are separate, so each remains an individual space of a size the graft can survive in.

The error that turns the technique against itself

If releases at the same depth run into one another, the individual cavities coalesce. The result is not a bigger lattice. It is one large cavity — a macrocavity — and a macrocavity is the exact geometry that fat grafting is trying to avoid.

This is worth stating carefully, because it is counterintuitive. The fat is identical. The volume is identical. The bed is not worse in any way that could be measured before the graft was placed. But in the second case the graft cannot organise itself into parcels that diffusion can support, because the space it was given has no internal walls. It pools, the rim takes, the centre does not, and the sequence runs on: fat necrosis, oil cyst, palpable lump, a patient returning for imaging and often biopsy, and a lesion that has to be distinguished from recurrence.

The surgeon did not place the fat badly. The surgeon made the space badly, several minutes earlier.

What separates the cavities, in practice

Three things, and they reinforce each other.

Varying the depth. Releases made at staggered depths cannot coalesce even where they cross in plan view. This is the most reliable of the three because it does not depend on precise spacing.

Varying the angle. Passes made along a single axis divide the same bands repeatedly and tend to open a plane. Passes made across several axes divide different bands and leave the tissue between them intact.

Restraint in extent. Each individual release is small — the manoeuvre is a division of a band, not a dissection. A pass that travels is a pass that has connected two cavities.

The counterintuitive summary is that a more aggressive release is not a better one. The endpoint is compliance with the internal structure preserved, and a bed that has been over-released has traded its structure for its compliance.

Knowing when it is done

The endpoint is tactile. The tissue lifts and spreads where it previously would not; the skin redrapes; tethering on the surface releases. It is a change in behaviour rather than a count of passes, which is why the number of releases is a poor way to describe or teach the technique and why the assessment has to be made continuously rather than at the end.

Over-release announces itself too, as a bed that feels loose rather than compliant — and by then the internal walls are gone.

The technique is performed blind, and that has consequences

Everything above describes an architecture built without seeing it. There is no direct vision; the surgeon knows where the instrument is by feel, by external landmarks, and by what the tissue does in response. Two consequences follow, and both are underappreciated.

The first is bleeding. Dividing fibrous bands divides small vessels running with them, and the resulting bleeding is into the cavities that were just created. Blood occupying a micro-cavity is blood displacing the graft, and a haematoma in a released bed is both a space-occupying problem and an infection risk. This is part of the argument for a release that is adequate rather than maximal: more division means more divided vessels.

The second is that the result cannot be inspected. There is no moment at which the surgeon sees the lattice and confirms it looks as intended. The endpoint is inferred from tissue behaviour, which means the technique is unusually dependent on the operator having a clear mental model of what they are constructing — and unusually unforgiving of one who is simply making passes until the tissue gives.

It is also why the complication presents so late and so misleadingly. A macrocavity created in theatre produces no sign at the time, no sign at the first dressing change, and becomes apparent as a lump months later, at which point it is naturally attributed to the graft.

Release and graft are one operation

The two steps are not independent. Release creates a specific internal architecture, and the graft is placed to populate it — small parcels into many cavities, not a volume into a pocket. A carefully created lattice filled by a single large deposit has wasted the release entirely, and this is why the same surgeon performs both and why the grafting technique has to match the release pattern that was actually made.

The wider role of release as bed preparation is covered in rigottomy as recipient-site preparation, the underlying principle in what rigottomy is, and the reason the geometry matters at all in what determines fat graft retention.

Where it is used

The technique originated in scar and burn contracture and remains a mainstay there. In breast surgery it appears in the constricting ring of a tuberous breast, described in rigottomy for tuberous breast and scar release; in the tethered and thin chest wall after mastectomy; and in the irradiated field, where both the release and its timing require care — the subject of depth, planes and radiotherapy timing.

What patients are told about recovery and staging is set out in is rigottomy safe: recovery and what to expect.

The short version

The technique is not “cutting the scar”. It is building an internal structure of many separate spaces, each small enough for a graft to survive in. Releases that join up destroy that structure, and the complication that follows is indistinguishable from bad grafting — which is why it is usually blamed on it.

This article is educational material for clinicians. It describes mechanics and failure modes, not a protocol, and gives no depths, spacings or pass counts: those are judgements about the tissue under the hand.