title: [Pneumocysts juxta-articular to the ilial bone and the sacral bone].
abstract: OBJECTIVE
  The purpose of the study was to detect and safely diagnose pneumatocysts by means of computed tomography.
  
  
  METHODS
  From September 1995 to May 1996 computed tomography of the pelvis was performed in six patients for various indications. A slice thickness of 8 mm was employed for all studies. One patient had undergone surgery for hyperparathyroidism nine years previously. Attenuation values within the coincidentally diagnosed pneumatocysts were obtained.
  
  
  RESULTS
  We found a total of 14 pneumatocysts juxtaarticular to the sacroiliac joint. Three patients demonstrated a bilateral intraarticular vacuum phenomenon, yet a joint communication was not found. The lesions did not coincide with inflammation, tumour or trauma.
  
  
  CONCLUSIONS
  Pneumatocysts are benign bone lesions associated with arthrotic changes of the sacroiliac joint. Computed tomography is the modality of choice for the diagnosis of pneumatocysts.
authors.affiliation: Institut für Röntgendiagnostik, Universitätsklinikum Charité, Humboldt Universität zu Berlin.
authors.forename: C
authors.initials: C
authors.lastname: Enzweiler
authors.forename: D
authors.initials: D
authors.lastname: Loreck
authors.forename: M
authors.initials: M
authors.lastname: Bollow
authors.forename: H
authors.initials: H
authors.lastname: Wilhelm
authors.forename: S
authors.initials: S
authors.lastname: Lenk
authors.forename: B
authors.initials: B
authors.lastname: Hamm
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001845:Bone Cysts / Q000000981:diagnostic imaging* / Q000628:therapy; D005260:Female; D006801:Humans; D006961:Hyperparathyroidism; D007085:Ilium / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D012446:Sacroiliac Joint / Q000000981:diagnostic imaging*; D012447:Sacrum / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed
vernacular_title: Juxtaartikuläre Pneumatozysten im Os ilium und Os sacrum.