title: New thoughts on the origin of Pellegrini-Stieda: the association of PCL injury and medial femoral epicondylar periosteal stripping.
abstract: OBJECTIVE
  For the past 100 years, Pellegrini-Stieda disease has been described as calcification and ossification within the tibial collateral ligament, although these typical radiographic findings are often located more superior than the most proximal extent of the ligament. In this article, we demonstrate four magnetic resonance imaging cases of knee trauma with complete posterior cruciate ligament tear or avulsion, each demonstrating that injury to the medial collateral ligamentous complex can involve significant stripping of the tissue proximal to the medial epicondyle.
  
  
  CONCLUSIONS
  Classic radiographic findings of Pellegrini-Stieda calcifications can be caused by stripping of the femoral periosteum proximal to the femoral attachment of the tibial collateral ligament, which appears to be associated with a complete posterior cruciate ligament injury.
authors.affiliation: Department of Radiology, MSC10 5530, University of New Mexico, Albuquerque, NM 87131-0001, USA. james.mcanally@comcast.net
authors.forename: James L
authors.initials: JL
authors.lastname: McAnally
authors.forename: Samuel L
authors.initials: SL
authors.lastname: Southam
authors.forename: Gary W
authors.initials: GW
authors.lastname: Mlady
mesh_terms: D000058:Accidental Falls; D000063:Accidents, Traffic; D000328:Adult; D005269:Femur / Q000293:injuries*; D006801:Humans; D007718:Knee Injuries / Q000175:diagnosis* / Q000209:etiology / Q000473:pathology / Q000628:therapy; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009999:Ossification, Heterotopic / Q000175:diagnosis* / Q000209:etiology / Q000473:pathology / Q000628:therapy; D016119:Posterior Cruciate Ligament / Q000293:injuries*