title: Pelvic instability after bone graft harvesting from posterior iliac crest: report of nine patients.
abstract: OBJECTIVE
  To report the imaging findings in nine patients who developed pelvic instability after bone graft harvest from the posterior aspect of the iliac crest.
  
  
  METHODS
  A retrospective study was performed of the imaging studies of nine patients who developed pelvic pain after autologous bone graft was harvested from the posterior aspect of the ilium for spinal arthrodesis. Plain films, bone scans, and CT and MR examinations of the pelvis were reviewed. Pertinent aspects of the clinical history of these patients were noted, including age, gender and clinical symptoms.
  
  
  RESULTS
  The age of the patients ranged from 52 to 77 years (average 69 years) and all were women. The bone graft had been derived from the posterior aspect of the iliac crest about the sacroiliac joint. All patients subsequently developed subluxation of the pubic symphysis. Eight patients had additional insufficiency fractures of the iliac crest adjacent to the bone graft donor site, and five patients also revealed subluxation of the sacroiliac joint. Two had insufficiency fractures of the sacrum and one had an additional fracture of the pubic ramus.
  
  
  CONCLUSIONS
  Pelvic instability is a potential complication of bone graft harvesting from the posterior aspect of the iliac crest. The pelvic instability is manifested by insufficiency fractures of the ilium and subluxation of the sacroiliac joints and pubic symphysis.
authors.affiliation: Department of Radiology, School of Medicine, University of California, San Diego Medical Center, 92103-1990, USA.
authors.forename: K
authors.initials: K
authors.lastname: Chan
authors.forename: D
authors.initials: D
authors.lastname: Resnick
authors.forename: M
authors.initials: M
authors.lastname: Pathria
authors.forename: J
authors.initials: J
authors.lastname: Jacobson
mesh_terms: D000368:Aged; D005260:Female; D006621:Hip Joint; D006801:Humans; D007085:Ilium / Q000637:transplantation*; D007593:Joint Instability / Q000209:etiology*; D008875:Middle Aged; D012189:Retrospective Studies; D020858:Tissue and Organ Harvesting / Q000009:adverse effects*