Correction of extra, joined or underdeveloped fingers and thumbs, timed to the child’s development so the hand grips, pinches and grows.
Congenital hand differences are present at birth and include extra fingers, joined fingers, a small or absent thumb and underdeveloped parts of the hand. Surgery aims at a hand that grips, pinches and grows, and the timing is set by the child's development rather than by the calendar.
An extra digit, polydactyly, is among the most frequent. It is often on the small finger side and may be a well formed digit with bone and joints, or little more than a skin tag. Duplication of the thumb is less common and more demanding to correct, because the aim is one thumb that is stable and mobile rather than simply the removal of the smaller one.
Joined fingers, syndactyly, may involve skin alone or skin and bone. Where the joined fingers are of unequal length, such as the thumb and index or the ring and small finger, the shorter one tethers the longer as the hand grows, which changes the timing of surgery.
Other patterns include a small or unstable thumb, a finger that will not straighten, a curved finger, constriction bands that encircle a digit or limb, and underdevelopment along the thumb or small finger side of the forearm. Some of these occur alongside conditions of the heart, spine, kidneys or blood, so a child with a thumb side difference is examined and investigated beyond the hand as a matter of routine.
Most reconstruction is done in the first two years, when healing is quick and the child adapts to a changed hand without having to relearn habits. Release of joined fingers is commonly carried out at around twelve to eighteen months, but is brought forward when unequal digits are tethering growth. Removal of an extra digit is often done at around a year. Thumb reconstruction, which may mean stabilising the joint, deepening the web or moving the index finger into the thumb position, is usually in the second year.
Releasing joined fingers almost always needs skin from elsewhere, because there is not enough skin to cover two separated fingers that previously shared a cover. Parents are told this in advance so that a graft is not a surprise. Not every difference needs surgery at all. An extra digit that carries no bone, or a curve that does not affect grip, may be left alone, and saying so is part of the assessment.
Small children are immobilised more than adults, often in a cast that covers the elbow so that it cannot be pulled off, usually for three to six weeks. Splints follow in many cases. Hand therapy then matters as much as the operation, and for a very young child much of it is guided play rather than formal exercise.
Because the hand keeps growing, review continues for years. Scars can tighten as a child grows and occasionally need release, and a thumb reconstructed at two is reassessed as function develops. This is expected rather than a sign that something went wrong, and families are asked to plan for long follow up from the outset.
| Factor | What it covers |
|---|---|
| Which difference is involved | A skin tag and a thumb reconstruction are not comparable |
| One hand or both | Bilateral differences may need staged operations |
| Complexity of the release | Whether bone as well as skin is involved |
| Skin grafting | Most separations of joined fingers need a graft |
| Paediatric anaesthesia | Anaesthesia and monitoring for a small child |
| Splints and hand therapy | Weeks of splinting and months of therapy |
| Staged surgery | Some hands are corrected in more than one sitting |
These pages answer the questions that most often come up alongside this one.
It varies widely, because the term covers everything from removing a skin tag to reconstructing a thumb over more than one operation. An estimate is given once the child has been examined and the plan agreed, covering surgery, paediatric anaesthesia, hospital stay, splints and therapy.
Most reconstruction is done in the first two years. Joined fingers are usually released at around twelve to eighteen months and an extra digit removed at around a year, but unequal joined digits are separated earlier because they distort growth. The child's fitness for anaesthesia comes before the ideal age.
The aim is a hand that grips, pinches and grows, and function is the measure used. Appearance improves, often greatly, but a hand that was formed differently is not made identical to the other one, and being clear about that before surgery matters more than optimism afterwards.
Two fingers that shared a single skin cover do not have enough skin between them to cover four sides once separated. The shortfall is made up with a graft, usually taken from the groin crease where the scar is hidden.
No. A well formed extra digit with bone and joints is usually addressed, both for function and because it interferes with grip later in life. A small tag without bone is a simpler problem, and some differences are best left alone.
Commonly three to six weeks, and in small children the cast is deliberately taken above the elbow so that it stays on. Splints often continue after that, and therapy continues for months.
Sometimes. Scars can tighten as the hand grows, and a reconstruction done in infancy is reassessed as function develops. Further surgery in childhood is part of the plan for some differences rather than a complication.
Congenital conditions are treated differently by different insurers, and some policies exclude them or apply a waiting period. The hospital team helps with documentation and pre-authorisation, and cover is confirmed with the insurer before surgery is scheduled.
Published with written patient consent and shown for education rather than promotion. Every case is different and these images are not a promise of results.
Consultations at Kiran Hospital, Katargam, Surat. Outstation and NRI patients can request a video consultation before travelling.