Transient Osteoporosis Hip
Definition
Self limiting syndrome of unknown aetiology
- hip pain associated with osteoporosis of proximal femur
DDx
AVN
- AVN of the hip in pregnancy is rare but possible
- TOH tends to be diffuse on MRI, while AVN is localised
- extends to neck and metaphysis
- transient osteoporosis has normal bone scan
Incidence
Rare
- M: F 3:1