4.P.15 COMPLICATIONS OF BIOLOGIC RECONSTRUCTION SURGERY FOR TREATMENT OF CHILDHOOD MALIGNANT MUSCULOSKELETAL TUMORS

Abstract

In an era where the survival rates of oncologic patients are improving, biologic reconstruction is the treatment of choice, however, it has its complications and fortunately we have the solutions.

Biological reconstruction was performed on 52 patients with a mean age of 11.3 (1.5–16) after malignant bone tumor resection in our institution between 1991 and 2008. Patients were followed up for a mean period of 49 months (3–216). Twenty-nine patients were diagnosed with osteosarcoma, 22 with Ewing sarcoma and 1 with adamantinoma. A wide range of vascular and nonvascular autografts, allografts, fibular transposition, bone regeneration and bone recycling techniques were utilised alone or in combination for reconstruction. Crucial anatomical parts (epiphyses, apophyses, triradiate cartilage, glenoid) were preserved in 41 patients while maintaining safe surgical margins.

Wound problem was the most common early complication. The most common late complications were nonunion, limb length discrepancy, limitation of range of motion (ROM), deformity, implant or external fixator failure and fibular graft fracture. Local recurrence was seen in only 2 patients. Patients underwent a mean of 0.8 (1–10) additional surgical interventions for treatment of complications. Thirty-one out of 43 lower extremity patients became ambulatory with full weight bearing and near full ROM while 4 died of disease and 2 were disarticulated prior to healing or treating of complications. Six patients with reconstructions around the glenohumeral joint had functional outcomes varying from excellent to poor with defect pseudoarthrosis. Two patients with successful pelvic reconstructions suffered from co-morbidities and disease itself. Implants and fixators, orthoses, physiotherapy and antibiotherapy were used as necessary for treatment of complications.

Biologic reconstruction yields good functional outcomes and allows more flexibility while treating complications since it preserves bone stock and epiphyses.