Unusual Dislocation of a Hip Tumor Endoprosthesis following Limb Salvage Surgery for Osteosarcoma of the Proximal Femur
10.4055/jkoa.2026.61.1.88
- Author:
Tae Yung HUH
1
;
Jae Young LEE
;
Hyung Lae CHO
;
Do Hyeng KIM
Author Information
1. Department of Orthopaedic Surgery, Good Samsun Hospital, Busan, Korea
- Publication Type:Case Report
- From:The Journal of the Korean Orthopaedic Association
2026;61(1):88-93
- CountryRepublic of Korea
- Language:English
-
Abstract:
Limb salvage surgery using a tumor prosthesis for the treatment of malignant bone tumors in the proximal femur is an effective method for preserving hip joint function. On the other hand, maintaining hip joint stability can be challenging because of the extensive resection of the bone and surrounding soft tissue. This paper reports an unusual case of hip dislocation in a patient with a proximal femoral osteosarcoma who underwent limb salvage surgery. Over six years, the tumor prosthesis gradually migrated posterosuperiorly above the iliac crest, resulting in 14 cm of lower limb shortening. The acetabular reconstruction was performed using an allograft, and the middle segment of the tumor prosthesis was removed to allow for hip reduction. Concurrent reconstruction of the hip abductor muscles was also carried out. No recurrence of the dislocation was observed during follow-up, and the patient could walk independently with the aid of an orthopedic brace, despite an 8 cm leg length discrepancy.
