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Open Access Highly Accessed Case report

Desmoid tumor of posterior cruciate ligament of the knee: a case report

Wang Ling1, Song Kedong2, Wang Hong3*, Zhang Weiguo3 and Lv Decheng3

Author Affiliations

1 Department of Oncology, First Affiliated Hospital of Dalian Medical University, Dalian, People’s Republic of China

2 Dalian R&D Center for Stem Cell and Tissue Engineering, Dalian University of Technology, Dalian 116024, China

3 Department of Orthopaedics, First Affiliated Hospital of Dalian Medical University, Dalian, People’s Republic of China

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BMC Musculoskeletal Disorders 2013, 14:69  doi:10.1186/1471-2474-14-69

Published: 23 February 2013

Abstract

Background

Desmoid tumor is a rare type of cancer that develops in the tissues that form tendons and ligaments. These tumors, also called aggressive fibromatosis, are considered benign with no metastatic potential. They may invade nearby tissues and organs, however, and can be difficult to control. Desmoid tumor in the posterior cruciate ligament (PCL) of the knee has never been described in the literature.

Case presentation

A 49-year-old man presented with a 2-month history of posteromedial knee dull pain and decreased range of motion of the knee. He was diagnosed desmoid tumor of posterior cruciate ligament of the knee by intraoperative biopsy, and underwent successful PCL resection and reconstruction by Four-strand semitendinosus and gracilis tendon autograft arthroscopically, and fortunately five years after operation, there were no clues as to recurrence of the tumor examined by Magnetic Resonance Imaging (MRI).

Conclusion

Desmoid tumor is characterized by infiltrative growth and a tendency towards recurrence,as this tumor entity is rare, data giving evidence based recommendations for the optimal treatment algorithm for this disease is lacking. At present there is no definite and effective method of treatment. However, early detection of the tumor play an important role, MRI is now the most important method for the detection of tumor extent, which facilitates the treatment choice as well as the prediction of prognosis. In our case, we followed-up the patient five years postoperatively by MRI and got a good result.

Keywords:
Desmoid tumor; Posterior cruciate ligament; Knee; Arthroscopical reconstruction; Surgery