Abstract
Background: Parosteal osteosarcoma (PAO), which is a surface osteosarcoma, can be treated with wide excision and endoprosthetic or allograft application. However, due to the low local recurrence and metastasis rate, when it appears in the posterior surface of the distal femur, can be managed with hemicortical wide resection and biological reconstruction with hemicortical allograft.The purpose of this study was to evaluate the oncological and functional outcomes of patients with parosteal osteosarcoma (PAO) of the posterior cortex of the distal femur who underwent biological reconstruction after hemicortical resection. Methods: Eleven patients who underwent wide tumor resection and defect reconstruction of the posterior surface of the distal femur using hemicortical allograft were studied retrospectively. Local recurrence, metastasis, complications and the functional outcome using the Musculoskeletal Tumor Society scoring system (MSTS Score) were evaluated.Results: The average postoperative follow-up period was 53.64 months (range, 30 to 84 months). At the latest follow up, all patients were free of the disease without appearing any metastases. A patient with local recurrence underwent revision surgery with fibula autograft reconstruction. The mean MSTS score was 93.45 ± 3.56. Conclusions: In patients with PAO of the posterior aspect of the distal femur the treatment of hemicortical resection and allograft reconstruction has satisfactory oncological and functional outcomes and low complication rates.
Hemicortical Resection and Biological Reconstruction using Allograft for Parosteal Osteosarcoma of the Distal Femur. A Case Series
