Real time MRI-guided excision and cryo-treatment of osteoid osteoma in os ischii--a case report.

摘要: A 36-year-old electrician had not been able towork during the last 8 months due to intense painin his left buttock. Plain radiographs were normal,but scintigraphy, MRI and CT indicated an osteoidosteoma in tuber os ischii. The patient wasgiven spinal anesthesia, placed a 0.5T GESigna SP/i open (General Electric, Milwau-kee, USA) (Figure 1). With decubi-tus position, surface coil was attached thenidus located. biopsy needle thecenter of lesion, using optical tracking sys-tem integrated magnet gantry, for placementof needle. 4 mm cylinder cored out andfixed formaldehyde histologic examinationwhich confirmed diagnosis osteoid osteoma.Then 3 cryo probe (Galil Medical, Haifa,Israel) centrally lesion (Figure2). cycles (1/2–2 min) with cooling –180€°Cinterrupted by passive thawing used. ControlMRI showed defect after biopsy. pa-tient pain-free one day operation,soon resumed full-time work, no symp-toms 1 year later.