- Osteonecrosis of lunate bone
- Fixed position in wrist
- Trauma, steroid
- Negative ulnar variance
- 20~40 yr
- Progressive pain, edema, limitation of motion
- Fissure, sclerosis, condensation, fragmentation of lunate bone
- Sequelae (+) : disorganization of wrist, schapholunate dissociation, osteoarthritis
- MR
- Early diagnosis
- TFCC or ligament injury, osteoarthritis
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