- patient presents with pain and possibly a limp;
- x-rays show severe osteoporosis, and bone scans show increased signal;
- MRI shows decreased Bone Marrow signal on T1 images and
increased signal on T2
- these changes are due to increase in bone marrow water content;
- joint effusion is also evident in T2-weighted images;
- may be confused with AVN in MR images;
- as pts return to normal in 6-10 months MRI images will return to normal.