Surgical Reconstruction Options

Reconstruction Principles

1. Oncologic Safety: Clear margins remain the first priority.

2. Functional Restoration: Maximize joint motion and weight-bearing capacity.

3. Durability: Select reconstruction that matches expected patient lifespan.

4. Simplicity: Avoid over-complex solutions when reliable alternatives exist.

5. Soft-Tissue Coverage: Adequate muscular or flap coverage is vital for wound healing and prosthesis protection.

Types of Reconstruction

1. Endoprosthetic Reconstruction

• Indication: Segmental bone loss in extremity sarcomas, especially around knee, hip, or shoulder.

• Technique: Modular metallic prostheses anchored with cemented or press-fit stems.

• Advantages: Immediate stability, early mobilization, predictable outcomes.

• Limitations: Mechanical failure, aseptic loosening, infection risk.

• Recent Advances: Silver-coated implants reduce deep infection rates; rotating-hinge designs improve knee kinematics.

2. Biological Reconstruction

Includes options that promote osteointegration or use native bone for long-term durability.

• Autograft (e.g., vascularized fibula): Used for diaphyseal or pediatric reconstructions; allows gradual hypertrophy and remodeling.

• Allograft: Large segmental grafts restore anatomy; can be combined with prosthesis (allograft–prosthetic composite).

• Recycled Autografts: Tumor-bearing bone re-implanted after sterilization (liquid nitrogen, autoclaving, or irradiation) in resource-limited settings.

• Limitations: Nonunion, graft fracture, late resorption, infection.

3. Allograft–Prosthetic Composite (APC)

• Indication: Periarticular resections where joint surface requires replacement but metaphyseal bone stock remains.

• Advantages: Combines biological fixation with mechanical stability.

• Outcomes: Good mid-term function, but risk of nonunion and graft resorption persists.

4. Arthrodesis 

• Indication: In cases of infection, poor soft-tissue coverage, or failed prosthesis.

• Technique: End-to-end bone fusion using compression plates, intramedullary rods, or vascularized fibula.

• Outcome: Pain-free but stiff limb; favored in young or high-demand patients.

5. Rotationplasty

• Indication: Selected femoral or distal thigh sarcomas in children and adolescents.

• Concept: Distal limb rotated 180°; ankle functions as the new knee joint.

• Advantages: Excellent durability, no prosthesis-related complications, good energy efficiency.

• Limitation: Cosmetic concerns; extensive rehabilitation required.

6. Amputation and Disarticulation

• Indication: When negative margins cannot be achieved or soft-tissue coverage is impossible.

• Technique: Emphasis on myodesis and optimal stump shaping for prosthetic fitting.

• Modern Focus: Myoelectric and osseointegrated prosthetic systems improving function and comfort.

Soft-Tissue Reconstruction

Adequate coverage is critical for wound healing and implant longevity:

• Local Muscle Flaps: Gastrocnemius (knee), latissimus dorsi (shoulder), rectus abdominis (pelvis).

• Free Flaps: ALT (anterolateral thigh), free latissimus dorsi for large defects.

• Vacuum-assisted closure (VAC): Useful for staged closure in contaminated wounds.

Complications and Outcomes

Complication Typical Cause Management     

Infection Extensive soft-tissue loss or long surgery Debridement ± prosthesis exchange, antibiotic spacers   Mechanical Failure Fatigue fracture, hinge breakage Modular revision, redesign   Nonunion (biological grafts) Insufficient fixation, poor vascularity Bone grafting, plate augmentation   Aseptic Loosening Stress shielding, bone loss Stem revision, cemented fixation   Local Recurrence Inadequate margins Re-resection, possible amputation

Key Points

• Surgical reconstruction after tumor resection must balance oncologic safety and functional restoration.

• Endoprosthetic replacement remains the gold standard for large periarticular resections.

• Endoprosthetic replacement provides the best early function but higher long-term complication risk.

• Biological methods are valuable for younger patients or diaphyseal defects.

• Multidisciplinary planning with plastic surgeons and rehabilitation teams optimizes outcomes.

• Rotationplasty remains a highly functional alternative in children with large femoral resections.

• Arthrodesis and amputation preserve oncologic safety when limb salvage is not feasible.

References

1. Jeys LM, Kulkarni A, Grimer RJ. Reconstruction after Resection of Musculoskeletal Tumors: Current Concepts. J Bone Joint Surg Br. 2023;105-B(4):412–422.

2. Abudu A, Grimer RJ, Tillman RM. Endoprosthetic Replacement of the Proximal Tibia: Functional and Oncological Outcomes. J Bone Joint Surg Br. 2019;101-B(3):350–358.

3. Avedian RS, et al. Allograft-Prosthetic Composites in Tumor Reconstruction. Clin Orthop Relat Res. 2020;478(2):238–247.

4. Puri A, Gulia A. Biological Reconstruction for Bone Tumors: Principles and Pitfalls. Indian J Orthop. 2021;55(6):1419–1428.

5. Jeys L, Wafa H, Grimer R. Silver-Coated Endoprostheses in High-Risk Patients: Infection Reduction and Survivorship. Bone Joint J. 2015;97-B(2):252–257.