Transient osteoporosis of the hip and spontaneous osteonecrosis of the knee: a common aetiology?
- 225 Downloads
The aetiologies of transient osteoporosis of the hip (TOH) and spontaneous osteonecrosis of the knee (SONK) are still unknown. Both entities present with pain and extensive bone marrow oedema is seen on magnetic resonance imaging.
Methods and materials
We describe a patient who presented with TOH and later also developed SONK. Initial magnetic resonance imaging findings of both the hip and the knee showed extensive bone marrow oedema and a subchondral fracture line suggesting that subchondral fractures might be of importance to the aetiology of both conditions.
To our knowledge, this is the first case report that describes the occurrence of TOH and SONK in the same patient and introduces the possibility of a common aetiology.
KeywordsMRI Hip Knee Osteonecrosis Osteoporosis Aetiology
Conflict of interest statement
- 2.Stoller DW, Firman PJF, Bredella MA (2006) Diagnostic imaging orthopedics, 3rd edn. Amirsys Inc., Salt Lake City, pp 410–413Google Scholar
- 3.Stoller DW, Firman PJF, Bredella MA (2006) Diagnostic imaging orthopedics, 3rd edn. Amirsys Inc., Salt Lake City, pp 586–589Google Scholar
- 4.Morrison WB, Sanders TG (2008) Problem solving in musculoskeletal imaging, 1st edn. Mosby Elsevier, Philadelphia, pp 515–516Google Scholar
- 5.Morrison WB, Sanders TG (2008) Problem solving in musculoskeletal imaging, 1st edn. Mosby Elsevier, Philadelphia, pp 643–644Google Scholar
- 6.Curtiss PH Jr, Kincaid WE (1959) Transitory demineralization of the hip in pregnancy. A report of three cases. J Bone Joint Surg Am A 41:1327–1333Google Scholar