title: MR imaging of calcification of the lateral collateral ligament of the knee: a rare abnormality and a cause of lateral knee pain.
abstract: OBJECTIVE
  Our objective was to describe the radiologic appearances of calcification of the lateral collateral ligament (LCL) of the knee in four patients who presented with acute atraumatic lateral knee pain. This rare abnormality has not, to our knowledge, been previously shown on MR imaging.
  
  
  CONCLUSIONS
  Calcification of the LCL of the knee is a rare cause of lateral knee pain and is thought to reflect underlying hydroxyapatite deposition. On MR imaging, calcification of the LCL may be associated with an aggressive appearance that can be mistaken for other knee abnormalities.
authors.affiliation: Department of Radiology, University Hospital of Bern, Inselspital, Bern CH 3010, Switzerland. suzanne.anderson@insel.ch
authors.forename: S E
authors.initials: SE
authors.lastname: Anderson
authors.forename: C
authors.initials: C
authors.lastname: Bosshard
authors.forename: L S
authors.initials: LS
authors.lastname: Steinbach
authors.forename: F T
authors.initials: FT
authors.lastname: Ballmer
mesh_terms: D000328:Adult; D002114:Calcinosis / Q000150:complications / Q000473:pathology*; D017885:Collateral Ligaments / Q000473:pathology*; D017886:Durapatite / Q000378:metabolism; D006801:Humans; D007719:Knee Joint; D008279:Magnetic Resonance Imaging; D008297:Male; D010146:Pain / Q000209:etiology
chemical_list: D017886:Durapatite