Polydactyly Single Complex Bony

Polydactyly single complex bony

Single complex bony polydactyly is a developmental disorder in which an additional finger or toe exists and has got a bone component to which the entire joint, tendinous, ligamentous, or even a portion of the skeleton of the primary digit may be connected. In contrast to simple (soft-tissue) polydactyly, it is anatomically more complex, and it is always necessary to have surgery.

What makes it “complex bony”?

• Bone and joints are found in extra digit.

May share:

• A common joint
• Tendons or muscles
• Neurovascular structures
• Frequently attacks hands more than feet.
• May be either thumb duplication (preaxial) or little finger duplication (postaxial).

Complex bony polydactyly surgery

Complex bony polydactyly surgery refers to a reconstructive surgery done to fix an additional finger or toe, which has bone, joints, tendons, and neurovascularity. In contrast to simple polydactyly, this surgery is aimed at preservation of the functions, alignment and growth potential, rather than removal.

Indications for Surgery

• Supernumerary bone or joint involvement.
• The common tendons, ligaments or nerves.
• Functional or cosmetic disability.
• Deformity risk with growth.

Best Age for Surgery 

• Hands: 6-12 months old (before fine motor development) 
• Feet: 9-18 months (or younger in case of shoe-wearing)
• Surgery may be done to older children and adults as well.

Preoperative Evaluation

• Clinical inspection.
• X-rays to assess the bone and joint anatomy. 

Identification of:

• Dominant digit
• Joint stability
• Connections of tendons and ligaments.
• Genetic assessment in case of suspicion of syndromic features.

Procedure:

Anaesthesia

• Operation conducted in a state of general anaesthesia.
• Involved in pediatric anaesthesiology team.

Incision & Exposure

Incisions planned to be made on the skin to enable:

• Adequate exposure
• Minimal scarring
• Proper skin closure

Bone Resection

• Elimination of the less efficient redundant figure.
• Osteotomy in case of fusion of bones.

Joint Reconstruction

• Saving and reconstruction of the primary joint.

Reconstruction of:

• Collateral ligaments
• Joint capsule
• Temporary K-wires in case of need to stabilize.

Tendon & Muscle Repair

Realignment of:

• Flexor tendons
• Extensor tendons
• Maintains correct movement and balance.

Neurovascular Preservation

• Easy dissections to avoid damaging nerves and blood vessels.
• Senses and circulation intact.

Skin Closure

• Local tension-free closure flaps.
• Absorbable sutures that are commonly used.

Postoperative Care

• Splint or cast for 2–4 weeks
• Suffering treated by using kid-friendly drugs.
• Check and suture removal of the wound at 10-14days.
• Mobilization following immobilization.

Bony polydactyly treatment

Bony polydactyly is an inborn abnormality in which the additional finger or toe will comprise bone and commonly joints. Due to the involvement of the skeleton, the treatment is surgical in nature; aiming at repairing normal structure, functioning, and the appearance.

Is it necessary to treat it all the time?

• Yes, in most cases

Bony polydactyly is non-regressive and may result in:

• Functional difficulty
• Atrophic angulation or abnormal growth.
• Cosmetic concerns
• Early treatment prevents deformity in the future.

Evaluation before treatment

Before surgery, doctors perform: 

• Clinical examination

X-ray imaging to assess:

• Bone structure
• Joint sharing
• Dominant functional digit
• Genetic assessment whether there are several abnormalities.

Final Treatment: Surgery.

Timing of Surgery

• Hand: 6–12 months of age
• Foot: 9–18 months of age
• Previous disability of functioning.

Surgical Approach

It is treated differently depending on complexity and location:

• Simple bony duplication
• Extra digit has its own bone
• Little reconstruction removal.

Complex bony duplication

• Certain joints, tendons or ligaments are shared.

Requires:

• Careful bone resection
• Joint reconstruction
• Balancing of tendons and ligaments.
• Neurovascular preservation

Complex polydactyly surgery recovery

The aim of recovery following complicated polydactyly surgery is on the healing of the surgery, restoration of normal movement, and normal growth of the repaired finger or toe. Because it is a bone and joint injury involving tendons and nerves, the healing process is slow but usually very positive results, especially in children. 

Early (First 24-72 Hours) Postoperative Period after Surgery 

• Drowsiness could have been related to the anaesthesia. 
• It is usually mildly swollen and uncomfortable.
• Medication is typically effective in the management of pain.
• Hand or foot position maintained in high position.
• Splint or bulky dressing.

Immobilization Phase (2–4 Weeks)

• The reconstruction is covered with splint or cast.
• Maintains stability of the joints during the healing process.

Parents should:

• Keep dressing dry and clean
• Look out for excessive swelling, redness or discharge.
• Follow-up visit: Wound check and suture removal (if non-absorbable) 7–14 days postoperatively. 

Early Healing Phase (3-6 Weeks) 

• Splint/cast is removed
• Gentle movement begins
• Mild stiffness is normal
• The use of the foot or the hand is developed by most children themselves.

Rehabilitation Sessions (6 weeks- 3 months)

• Complex cases might require hand or foot therapy.

Focus on:

• Improving range of motion
• Preventing stiffness
• Strengthening muscles
• The infants normally heal without any formal treatment.

Long-Term Rehabilitation [3 to 12 Months] 

• The swelling fades away slowly.
• Scar softens and fades
• Power and unity keeps on getting better.
• Follow-ups are done to monitor normal pattern of growth.

Bony polydactyly complications

Bony polydactyly is the presence of additional fingers or toes that are bone and joint structured. Although surgical repair is very successful, there may arise certain complications because of complexity of bone, joint, tendon, and neurovascular repair.

Early Postoperative Complications

• Infection
• Bleeding or hematoma
• Pain and swelling
• Wound healing issues

Bone & Joint-Related Complications

• Joint stiffness
• Residual deformity or angulation
• Unequal digit length
• Non-union or malunion

Tendon and Muscle Complications

• Imbalance in flexor or extensor tendons
• Weak grip or reduced fine motor function

Neurovascular Complications

• Nerve injury
• Circulatory compromise

Scar and Cosmetic Issues

• Hypertrophic or raised scars
• Skin contracture
• Visible asymmetry

Complications Related to Growth

• At the time of very early surgery, digit growth may be minimally impaired
• Occasionally a small revision surgery is required during growth.

Rare Complications

• Recurrent small bony remnant if complete excision is not performed
• In some complex cases, secondary surgery to correct alignment and/or function may be necessary.

Best hospital for complex polydactyly India

• Artemis Hospital, Gurgaon
• Medanta-The Medicity, Gurgaon
• Fortis Memorial Research Institute, Gurgaon
• Max Hospital, Saket

Conclusion

Bony or complex polydactyly is an inborn disorder in which a second finger or toe incorporates bone, joints, tendons and occasionally neurovascular systems. It differs with simple polydactyly in that it must be surgically repaired to achieve the correct anatomy, function and appearance. Physical check-up and X-rays; genetic analysis in case of syndromic features. In most instances, the recovery follows immobilization of 2-4 weeks with gradual restoration of normal functioning. Through a well-timed assessment, effective surgical care, and good postoperative care, children with bony or complex polydactyly may attain the best functional and architectural outcomes and lead a normal life with the use of their hands or feet.

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FAQ

Is operation necessary?

• Yes. Involving bones and joints, surgery is the only definitive treatment that can resore function and appearance.

At what age is surgery done?

• Hands: 6–12 months
• Feet: 9–18 months
• Deformity can be prevented and normal growth and development can be maintained by early surgical interventions.

Will my child have normal function after surgery?

• Yes, most children can expect to have normal or near normal function provided the postoperative care and therapy if any are adequate.

Can it recur after surgery?

• Recurrence is vanishingly rare if the extra digit is fully removed surgically.

Is bony polydactyl hereditary?

• It can be hereditary, but most cases are sporadic, with no family history.

Will scars change the appearance or the function?

• Scars tend to be minimal and fade away with time, and functional effects are limited with good surgical technique.

Is physiotherapy necessary?

• Only in some complicated cases; babies frequently return to normal movement on their own.