Case Report
Copyright ©The Author(s) 2015. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Orthop. Oct 18, 2015; 6(9): 744-749
Published online Oct 18, 2015. doi: 10.5312/wjo.v6.i9.744
Ewings sarcoma of patella: A rare entity treated with a novel technique of extensor mechanism reconstruction using tendoachilles auto graft
Rejith Mannambeth Valsalan, Balaji Zacharia
Rejith Mannambeth Valsalan, Balaji Zacharia, Department of Orthopaedics, Govt. Medical College, Kerala 673017, India
Author contributions: Valsalan RM and Zacharia B designed the report; Zacharia B collected clinical data and imaging; both authors analysed the data and wrote the paper.
Institutional review board statement: The study was reviewed and approved by Govt. Medical College, Kozhikkode.
Informed consent statement: All study participants, or their legal guardian, provided informed written consent prior to study enrollment.
Conflict-of-interest statement: None.
Open-Access: This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/
Correspondence to: Dr. Balaji Zacharia, MSortho, Dortho, Associate Professor, Department of Orthopaedics, Govt. Medical College, Kozhikkode, Kerala 673017, India. balaji.zacharia@gmail.com
Telephone: +91-94-47667138
Received: March 8, 2015
Peer-review started: March 15, 2015
First decision: April 17, 2015
Revised: July 15, 2015
Accepted: July 21, 2015
Article in press: July 23, 2015
Published online: October 18, 2015
Processing time: 225 Days and 18.6 Hours
Abstract

We report a case of Ewings sarcoma (ES) involving the patella in a young female. ES of patella is a rare entity. The patient was presented with anterior knee pain and swelling arising from the patella. She was treated with neoadjuvant chemotherapy followed by wide excision of the patella and reconstruction of the extensor mechanism using split tendoachilles auto graft. The patella is an uncommon site for primary or metastatic tumors of the bone. ES, though rare, should be included in the differential diagnosis of swellings arising from the patella. Auto graft from the tendoachilles is a good alternative for reconstructing the extensor mechanism of the knee.

Keywords: Patellar tumor; Tendoachilles auto graft; Extensor mechanism repair; Ewing sarcoma; CD99

Core tip: We are presenting an article of Ewings sarcoma (ES) of the patella-a rare entity treated by a novel technique. The common reported tumors of the patella include chondroblastoma, giantcell tumor, osteosarcoma, metastasis, etc. We could not find any report on a single case of ES/PNET in the patella treated with patellectomy and extensor mechanism reconstruction using tendoachilles auto graft in the whole of English bio-medical literature. We present here a case of ES of the right patella in a 26 years old female. All reported extensor mechanism reconstructions after patellectomy were by tendoachilles allografts. We resorted to a novel technique of reconstruction of the extensor mechanism using tendoachilles auto graft.