Not every child with Poland anomaly needs hand surgery. Hand involvement occurs in only about 10–15% of cases. Even when it is present, not all hand differences significantly affect function or quality of life. The decision to operate should be based on a thoughtful assessment of what the surgery would actually achieve.
What hand differences does Poland anomaly cause?
When Poland anomaly includes hand involvement, the most common findings are:
- Syndactyly — webbing or fusion between fingers, usually the middle three (long, ring, and small). The webbing may be simple (skin only) or complex (involving bone).
- Brachydactyly — short fingers, most often affecting the middle phalanges (the middle bones of the fingers). This creates a characteristic short, stubby appearance to some or all fingers.
- Hypoplasia — underdevelopment of the entire hand, which may be smaller than the opposite hand with reduced muscle mass and soft tissue.
These findings are unilateral — they occur on the same side as the chest involvement. The other hand is typically completely normal.
More detail on how each of these presents is available on the webbed fingers and small hand / short fingers symptom pages.
When is hand surgery recommended?
The primary question is always functional: does the hand difference limit what the child can do, and will surgery reliably improve that? For syndactyly involving the border digits (thumb-index or ring-small finger), separation is almost always recommended because joined border digits tether each other during growth and impair function. For middle three digit syndactyly, the functional impact varies — but early release is still commonly recommended to allow independent finger movement.
For brachydactyly, the calculus is different. Short fingers often adapt well functionally, and children with brachydactyly typically develop strong grip and fine motor skills. Surgery to lengthen fingers is a longer, more involved process (see below) and is not universally recommended. Many families choose observation and adaptation over surgical intervention for brachydactyly.
Syndactyly release: what the surgery involves
Syndactyly release separates the joined fingers using a technique that reconstructs the web space between them. Because the fingers share a limited amount of skin, it is not possible to simply cut them apart — the surgeon designs a series of skin flaps that interdigitate (dovetail) to cover the finger sides while also reconstructing the natural web space.
When there is insufficient local skin to cover both finger surfaces, a skin graft is taken from the groin or the inner upper arm and applied to one of the fingers. The donor site heals and is typically not visible in day-to-day life.
Timing of syndactyly release
The standard timing for syndactyly release is between 6 months and 2 years of age. The earlier end of this range is preferred for complex syndactyly and for border digit involvement. For simpler syndactyly without urgent functional risk, surgery in the second year is common.
The reason for early intervention is developmental: children who have their fingers separated early adapt to independent finger use rapidly. The nervous system's plasticity during this period supports functional reorganization. Waiting until school age or later does not necessarily produce worse surgical results, but it reduces the developmental window for adaptation.
Recovery
After surgery, the hand is placed in a cast or bulky dressing for approximately three to four weeks. Young children tolerate this surprisingly well. Following cast removal, occupational therapy or hand therapy typically begins to encourage active finger use and prevent scarring from limiting range of motion. The healing process continues for several months, and the appearance of scars improves significantly over the first year.
Brachydactyly: when lengthening is considered
Distraction osteogenesis is the standard technique for lengthening short finger bones. A bone is surgically cut, and a small external fixator device is applied. Over several weeks, the device is gradually adjusted — usually by the parents at home — to slowly separate the bone ends. New bone fills in the gap as it forms. The process is slow, requires regular adjustment, and involves wearing the device for several months.
Candidates for finger lengthening are typically those where short fingers cause meaningful functional limitation — not simply those with a cosmetic difference. Children who want to play a musical instrument requiring finger reach, or who have documented grip or dexterity limitations, may benefit. For many children with Poland anomaly brachydactyly, however, the hand adapts well and lengthening is not pursued.
This is a decision that should involve not just the surgeon, but also the child (as they get older) and an occupational therapist who can assess functional limitations objectively.
What surgery cannot do
Hand surgery for Poland anomaly improves what is present — it does not create new structures. A small hand will remain smaller than the opposite hand after surgery. Short fingers can be lengthened but typically not to the length of a normally developed hand. Surgery creates conditions for better function and appearance, but families should have realistic expectations about the degree of change achievable.
Children often adapt more effectively than adults expect. Many children with Poland anomaly hand differences develop remarkable grip strength, fine motor skills, and functional independence. The hand difference may be more limiting in the parent's perception than in the child's lived experience. Occupational therapy assessment — before surgery — can give a clearer picture of what function is actually present and what surgical goals are realistic.
Finding the right surgeon
Hand surgery for children with Poland anomaly should be performed by a pediatric hand surgeon — a specialist with training in congenital hand differences. This is distinct from an adult hand surgeon or a general plastic surgeon. Pediatric hand surgeons have specific experience with syndactyly release, congenital reconstruction, and the developmental considerations that apply to children.
Because Poland anomaly is rare, surgeons who have performed Poland anomaly hand surgery specifically bring relevant context. Our specialist directory includes providers with documented Poland anomaly experience.
Questions to ask before hand surgery
- What functional problem is this surgery solving — and how confident are you it will solve it?
- What does recovery look like, and what will my child need during the healing period?
- How many syndactyly releases or similar procedures have you performed on children this age?
- Are there risks specific to the anatomy here — for example, complex versus simple syndactyly?
- What happens if we wait a year? Does timing affect outcomes for this specific presentation?
- What role does hand therapy play after surgery, and will we need a referral?