title: Paradiaphyseal calcific tendinitis with cortical bone erosion.
abstract: OBJECTIVE
  To determine the clinical, radiologic, and histologic features of calcific tendinitis with cortical bone erosion.
  
  
  METHODS
  The records of 6 patients with paradiaphyseal calcific tendinitis and adjacent bone cortex erosion were reviewed.
  
  
  RESULTS
  Calcific tendinitis involved the linea aspera in 4 patients, the bicipital groove in 1 patient, and the deltoid insertion in another. Calcium deposits were associated with cortical bone erosions, revealed on plain radiographs in 4 patients and computed tomography scans in 2. Bone scans were performed in 2 patients and showed local hyperfixation of the isotope. In 4 patients, suspicion of a neoplasm led to a biopsy. Calcium deposits appeared to be surrounded by a foreign body reaction with numerous giant cells. Apatite crystals were identified by transmission electron microscopy and elemental analysis in 1 surgical sample.
  
  
  CONCLUSIONS
  Paradiaphyseal calcific tendinitis with cortical bone erosion is an uncommon presentation of apatite deposition disease.
authors.affiliation: Clinique de Rhumatologie, Centre Viggo Petersen, Hôpital Lariboisière, Paris, France.
authors.forename: P
authors.initials: P
authors.lastname: Fritz
authors.forename: T
authors.initials: T
authors.lastname: Bardin
authors.forename: J D
authors.initials: JD
authors.lastname: Laredo
authors.forename: J M
authors.initials: JM
authors.lastname: Ziza
authors.forename: G
authors.initials: G
authors.lastname: D'Anglejan
authors.forename: J
authors.initials: J
authors.lastname: Lansaman
authors.forename: B
authors.initials: B
authors.lastname: Bucki
authors.forename: M
authors.initials: M
authors.lastname: Forest
authors.forename: D
authors.initials: D
authors.lastname: Kuntz
mesh_terms: D000328:Adult; D000368:Aged; D001031:Apatites / Q000032:analysis; D001706:Biopsy; D001862:Bone Resorption / Q000000981:diagnostic imaging* / Q000473:pathology; D002114:Calcinosis / Q000175:diagnosis / Q000000981:diagnostic imaging*; D005260:Female; D005269:Femur / Q000000981:diagnostic imaging; D006801:Humans; D006811:Humerus / Q000000981:diagnostic imaging; D008279:Magnetic Resonance Imaging; D008297:Male; D008854:Microscopy, Electron; D008875:Middle Aged; D052256:Tendinopathy / Q000000981:diagnostic imaging* / Q000473:pathology; D014057:Tomography, X-Ray Computed
chemical_list: D001031:Apatites