Figure 7a. Paget disease of bone in a 50-year-old woman. (a) Axial T1-weighted MR image of the pelvis shows abnormally low-signal-intensity marrow in the left ilium (arrowhead) and thickened cortex (arrow). (b) Axial CT image of the pelvis better illustrates the cortical thickening (arrow), a finding typical of Paget disease. Approximately 1% of patients referred to the Orthopaedic Oncology Clinic had abnormalities at MR imaging that could have been easily diagnosed as Paget disease at radiography or CT.