Won-Ju Jeong; Il-Hyung Park

doi:10.5292/jkbjts.2013.19.2.74

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Jeong and Park: The Failure of Polyethylene Lock of MUTARS® Distal Femur Tumor Endoprostheses: A Case Report

Case Report

J Korean Bone Joint Tumor Soc 2013;19(2):74-77.

Published online: 10 January 2013

DOI: https://doi.org/10.5292/jkbjts.2013.19.2.74

The Failure of Polyethylene Lock of MUTARS^® Distal Femur Tumor Endoprostheses: A Case Report

Won-Ju Jeong, Il-Hyung Park

Department of Orthopedic Surgery, School of Medecine, Kyungpook National University, Daugu, Korea

Correspondence to: Il-Hyung Park Department of Orthopedic Surgery, Kyungpook National University Hospital, 130, Dongdeok-ro, Jung-gu, Daegu 700-721, Korea TEL: +82-53-420-5634 FAX: +82-53-420-6337 E-mail: ihparkmdrip@gmail.com

Received 1 November 2013 Revised 27 November 2013 Accepted 28 November 2013

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The guidelines for the treatment of massive bone defects caused by bone resection due to tumors have changed from amputation to limb salvaging surgery. Limb salvaging surgery using endoprotheses is a well-established procedure. However, Aseptic loosening, infection, and mechanical defect remain significant problems. Among them, we experienced the case with a breakage of polyethylene lock of MUTARS^® distal femur tumor Endoprostheses.

Keywords: MUTARS^®, distal femur tumor endoprostheses, breakage of polyethylene lock

References

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Figure 1.

(A) The osteolytic lesion(arrow) at medial aspect of left distal femur is observed on knee radiogram. (B) At presentation, the axial T1-weighted enhanced MRI image shows the high signal intensity lesion with soft tissue invasion. The differential diagnosis includes osteosarcoma. (C) The improvement of the osteosarcoma on axial T1-weighted MRI image is demonstrated after neoadjuvant chemotherapy. (D) The photograph shows the sagittally sectioned, distal femoral specimen. (E) The immediate postoperative radiogram of limb salvage surgery using Mutars^® endoprostheses is shown. (F) The follow-up radiogram reveals a small dense particle (arrow head) on the lateral aspect of femoral condylar component.

Figure 2.

(A) The central breakage (arrow) on LOCK and two saw tracks (arrow head) on the medial part of LOCK are observed. (B) The original LOCK in the Mutars^® endoprotheses is demonstrated.

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