title: Desmoid tumor of posterior cruciate ligament of the knee: a case report.
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.
  
  
  METHODS
  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).
  
  
  CONCLUSIONS
  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.
authors: Department of Oncology, First Affiliated Hospital of Dalian Medical University, Dalian, People's Republic of China.
authors: Wang
authors: W
authors: Ling
authors: Song
authors: S
authors: Kedong
authors: Wang
authors: W
authors: Hong
authors: Zhang
authors: Z
authors: Weiguo
authors: Lv
authors: L
authors: Decheng
mesh_terms: D018771:Arthralgia / Q000175:diagnosis / Q000209:etiology; D001182:Arthroscopy; D001696:Biomechanical Phenomena; D001706:Biopsy; D055088:Early Detection of Cancer; D018222:Desmoid Tumors / Q000150:complications / Q000175:diagnosis / Q000503:physiopathology / Q000601:surgery; D006801:Humans; D007719:Knee Joint / Q000503:physiopathology / Q000601:surgery; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D019637:Orthopedic Procedures; D016119:Posterior Cruciate Ligament / Q000473:pathology / Q000503:physiopathology / Q000601:surgery; D011237:Predictive Value of Tests; D016059:Range of Motion, Articular; D019651:Plastic Surgery Procedures; D013710:Tendons / Q000637:transplantation; D016896:Treatment Outcome