Etiology
- Primary
- Secondary, eg, rheumatoid arthritis, trauma, gout, hyperparathyroidism, hemochromatosis, Charcot joint
DDx
- Rheumatoid arthritis
- Seronegative spondyloarthropathy, eg, psoriatic arthritis
- Gout
- Chondrocalcinosis, eg, pseudogout, Wilson’s disease
- Other bone disease, eg, osteoporosis, metastatic cancer, multiple myeloma
