title: Neoplastic involvement of the sacroiliac joint: MR and CT features.
abstract: The radiological findings in five patients with pelvic soft tissue neoplasms directly involving the sacroiliac joint, are described. All patients had Computed Tomography (CT) examinations, two of the patients also having Magnetic Resonance Imaging (MRI). The role of imaging in this uncommon entity is discussed as well as the importance of making this diagnosis, thereby excluding unilateral sacroiliitis. The therapeutic implications of this diagnosis relate to local neural involvement, especially the sciatic nerve, and the fact that involvement of the sacroiliac joint by tumors significantly compromises chances of a successful surgical outcome. The role of MR in this condition is not yet certain, but it may prove to be the method of choice in view of its excellent depiction of skeletal neoplasms.
authors.affiliation: Department of Radiology, Austin Hospital, Victoria, Australia.
authors.forename: M
authors.initials: M
authors.lastname: Silberstein
authors.forename: O
authors.initials: O
authors.lastname: Hennessy
authors.forename: L
authors.initials: L
authors.lastname: Lau
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D012446:Sacroiliac Joint / Q000503:physiopathology*; D012983:Soft Tissue Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging* / Q000473:pathology; D014057:Tomography, X-Ray Computed