TY - JOUR
T1 - Sacroiliac joint beyond sacroiliitis—further insights and old concepts on magnetic resonance imaging
AU - Carneiro, Bruno Cerretti
AU - Rizzetto, Thiago Astil
AU - Silva, Flávio Duarte
AU - da Cruz, Isabela Azevedo Nicodemos
AU - Guimarães, Júlio Brandão
AU - Ormond Filho, Alípio Gomes
AU - Nico, Marcelo Astolfi Caetano
N1 - Funding Information:
This manuscript was reviewed by the American Journal of Experts for professional language editing services.
Publisher Copyright:
© 2022, The Author(s), under exclusive licence to International Skeletal Society (ISS).
PY - 2022/10
Y1 - 2022/10
N2 - The sacroiliac joint (SIJ) is an amphiarthrosis composed of a posterior syndesmosis and an anterior cartilaginous portion, with limited yet present mobility. Its main function is to transmit the load from the axial skeleton to the lower limbs and vice-versa; it is susceptible to early mechanical and degenerative changes which are much more common than inflammatory sacroiliitis. Magnetic resonance imaging (MRI) has increasingly been used to evaluate these changes, and while subchondral bone marrow edema (BME) is a common finding related to both, care must be taken when applying the ASAS research MRI definition for sacroiliitis without considering lesion BME topography, size and depth, concomitant structural damage and, of course, the clinical picture. In this review, we will discuss the anatomy and biomechanics of the SIJ, the noninflammatory causes of SIJ subchondral BME, and how these concepts combined can be used to increase our diagnostic confidence.
AB - The sacroiliac joint (SIJ) is an amphiarthrosis composed of a posterior syndesmosis and an anterior cartilaginous portion, with limited yet present mobility. Its main function is to transmit the load from the axial skeleton to the lower limbs and vice-versa; it is susceptible to early mechanical and degenerative changes which are much more common than inflammatory sacroiliitis. Magnetic resonance imaging (MRI) has increasingly been used to evaluate these changes, and while subchondral bone marrow edema (BME) is a common finding related to both, care must be taken when applying the ASAS research MRI definition for sacroiliitis without considering lesion BME topography, size and depth, concomitant structural damage and, of course, the clinical picture. In this review, we will discuss the anatomy and biomechanics of the SIJ, the noninflammatory causes of SIJ subchondral BME, and how these concepts combined can be used to increase our diagnostic confidence.
KW - Anatomy
KW - Degenerative
KW - MRI
KW - Sacroiliac joint
KW - Spondyloarthritis
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U2 - 10.1007/s00256-022-04067-9
DO - 10.1007/s00256-022-04067-9
M3 - Review article
C2 - 35556157
AN - SCOPUS:85129907782
SN - 0364-2348
VL - 51
SP - 1923
EP - 1935
JO - Skeletal radiology
JF - Skeletal radiology
IS - 10
ER -