title: A rare knee extensor mechanism injury: Vastus intermedius tendon rupture.
abstract: BACKGROUND
  Quadriceps tendon injuries are rare. There is a limited number of studies in the literature, reporting partial quadriceps tendon ruptures. We did not find any study reporting an isolated vastus intermedius tendon injury in the literature.
  
  
  METHODS
  A 22 years old professional rugby player with the complaints of pain in the right lower limb, decreased range of motion in right knee and a mass in the mid-anterior of the right thigh applied following an overloading on his hyperflexed knee during a rugby match. T2 sequence magnetic resonance images revealed discontinuity in the vastus intermedius tendon and intramuscular hematoma. The patient has been conservatively treated.
  
  
  CONCLUSIONS
  Quadriceps tendon ruptures generally occur after the 4th decade in the presence of degenerative changes. Our case is a young professional rugby player. Isolated vastus intermedius tendon rupture is unusual. Conservative treatment is performed as the intermedius tendon is in the deepest layer of the quadriceps muscle.
  
  
  CONCLUSIONS
  We report the first case of isolated rupture of the vastus intermedius tendon in the literature and we claim that disorder may be succesfully treated with conservative treatment and adequate physiotheraphy.
authors: Metin Sabanci Baltalimani Bone Diseases Training and Research Hospital, Istanbul, Turkey. Electronic address: drengincetinkaya@gmail.com.
authors: Engin
authors: E
authors: Cetinkaya
authors: Metin Sabanci Baltalimani Bone Diseases Training and Research Hospital, Istanbul, Turkey.
authors: Canan Gonen
authors: CG
authors: Aydin
authors: Metin Sabanci Baltalimani Bone Diseases Training and Research Hospital, Istanbul, Turkey.
authors: Yunus Emre
authors: YE
authors: Akman
authors: Metin Sabanci Baltalimani Bone Diseases Training and Research Hospital, Istanbul, Turkey.
authors: Murat
authors: M
authors: Gul
authors: Metin Sabanci Baltalimani Bone Diseases Training and Research Hospital, Istanbul, Turkey.
authors: Yavuz
authors: Y
authors: Arikan
authors: Metin Sabanci Baltalimani Bone Diseases Training and Research Hospital, Istanbul, Turkey.
authors: Osman Emre
authors: OE
authors: Aycan
authors: Metin Sabanci Baltalimani Bone Diseases Training and Research Hospital, Istanbul, Turkey.
authors: Yavuz Selim
authors: YS
authors: Kabukcuoglu
keywords: Extensor; Partial rupture; Quadriceps; Vastus intermedius