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Anatomical variants in two patients without osteochondromatosis (outside the study group). Bilateral iliosacral complexes (a, b; asterisks) on oblique coronal reformatted (a) and axial (b) computed tomography (CT) images in a 66-year-old woman who underwent the pelvic CT exam for total hip arthroplasty control. An accessory sacroiliac joint (c; asterisk) on axial CT image in a 38-year-old woman who underwent the lumbar spinal CT exam for posterior spinal fixation hardware control.
