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Seronegative spondyloarthropathy-related sacroiliitis: CT, MRI features and differentials.

Prakash D, Prabhu SM, Irodi A - Indian J Radiol Imaging (2014)

Bottom Line: Seronegative spondyloarthropathy is a group of chronic inflammatory rheumatic diseases that predominantly affect the axial skeleton.Involvement of sacroiliac joint is considered a hallmark for diagnosis of seronegative spondyloarthropathy and is usually the first manifestation of this condition.We present a pictorial essay of CT and MRI imaging findings in seronegative spondyloarthropathy-related sacroiliitis in various stages and highlight common differentials that need to be considered.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology, Christian Medical College, Vellore, Tamil Nadu, India.

ABSTRACT
Seronegative spondyloarthropathy is a group of chronic inflammatory rheumatic diseases that predominantly affect the axial skeleton. Involvement of sacroiliac joint is considered a hallmark for diagnosis of seronegative spondyloarthropathy and is usually the first manifestation of this condition. It is essential for the radiologist to know the computed tomography (CT) and magnetic resonance imaging (MRI) features of spondyloarthropathy-related sacroiliitis as imaging plays an important role in diagnosis and evaluation of response to treatment. We present a pictorial essay of CT and MRI imaging findings in seronegative spondyloarthropathy-related sacroiliitis in various stages and highlight common differentials that need to be considered.

No MeSH data available.


Related in: MedlinePlus

Findings of chronic sacroiliitis on MRI. (A) Coronal oblique T1W MR image without fat suppression in a 33 year old male with ankylosing spondylitis shows fatty deposition on both iliac (white arrows) and sacral surfaces (black arrows). (B) Corresponding coronal oblique STIR MR image shows suppression of fat signal (white arrows) without any edema. (C) Axial T1W MR image shows multiple subchondral erosions (black arrow). (D) T1W oblique coronal image without fat suppression in another patient shows subchondral sclerosis (thin white arrow), erosion (black arrow), and fatty deposition around the sacroiliac joint (short white arrow). (E) Coronal oblique T1W images without fat supression through sacroiliac joints show complete joint ankylosis (white arrows) in a 60 year old male with ankylosing spondylitis
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Figure 9: Findings of chronic sacroiliitis on MRI. (A) Coronal oblique T1W MR image without fat suppression in a 33 year old male with ankylosing spondylitis shows fatty deposition on both iliac (white arrows) and sacral surfaces (black arrows). (B) Corresponding coronal oblique STIR MR image shows suppression of fat signal (white arrows) without any edema. (C) Axial T1W MR image shows multiple subchondral erosions (black arrow). (D) T1W oblique coronal image without fat suppression in another patient shows subchondral sclerosis (thin white arrow), erosion (black arrow), and fatty deposition around the sacroiliac joint (short white arrow). (E) Coronal oblique T1W images without fat supression through sacroiliac joints show complete joint ankylosis (white arrows) in a 60 year old male with ankylosing spondylitis

Mentions: Subchondral fatty deposition [Figure 9]: It is an important indicator of chronic sacroiliitis. It is seen as subchondral T1W hyperintensity which gets suppressed on fat-saturated images. As an isolated finding, it is nonspecific and represents sequelae of previous inflammation. However, when associated with other findings like erosions, sclerosis, or bony bridging, it helps in diagnosing spondyloarthropathy-related sacroiliitis[12]


Seronegative spondyloarthropathy-related sacroiliitis: CT, MRI features and differentials.

Prakash D, Prabhu SM, Irodi A - Indian J Radiol Imaging (2014)

Findings of chronic sacroiliitis on MRI. (A) Coronal oblique T1W MR image without fat suppression in a 33 year old male with ankylosing spondylitis shows fatty deposition on both iliac (white arrows) and sacral surfaces (black arrows). (B) Corresponding coronal oblique STIR MR image shows suppression of fat signal (white arrows) without any edema. (C) Axial T1W MR image shows multiple subchondral erosions (black arrow). (D) T1W oblique coronal image without fat suppression in another patient shows subchondral sclerosis (thin white arrow), erosion (black arrow), and fatty deposition around the sacroiliac joint (short white arrow). (E) Coronal oblique T1W images without fat supression through sacroiliac joints show complete joint ankylosis (white arrows) in a 60 year old male with ankylosing spondylitis
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4126143&req=5

Figure 9: Findings of chronic sacroiliitis on MRI. (A) Coronal oblique T1W MR image without fat suppression in a 33 year old male with ankylosing spondylitis shows fatty deposition on both iliac (white arrows) and sacral surfaces (black arrows). (B) Corresponding coronal oblique STIR MR image shows suppression of fat signal (white arrows) without any edema. (C) Axial T1W MR image shows multiple subchondral erosions (black arrow). (D) T1W oblique coronal image without fat suppression in another patient shows subchondral sclerosis (thin white arrow), erosion (black arrow), and fatty deposition around the sacroiliac joint (short white arrow). (E) Coronal oblique T1W images without fat supression through sacroiliac joints show complete joint ankylosis (white arrows) in a 60 year old male with ankylosing spondylitis
Mentions: Subchondral fatty deposition [Figure 9]: It is an important indicator of chronic sacroiliitis. It is seen as subchondral T1W hyperintensity which gets suppressed on fat-saturated images. As an isolated finding, it is nonspecific and represents sequelae of previous inflammation. However, when associated with other findings like erosions, sclerosis, or bony bridging, it helps in diagnosing spondyloarthropathy-related sacroiliitis[12]

Bottom Line: Seronegative spondyloarthropathy is a group of chronic inflammatory rheumatic diseases that predominantly affect the axial skeleton.Involvement of sacroiliac joint is considered a hallmark for diagnosis of seronegative spondyloarthropathy and is usually the first manifestation of this condition.We present a pictorial essay of CT and MRI imaging findings in seronegative spondyloarthropathy-related sacroiliitis in various stages and highlight common differentials that need to be considered.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology, Christian Medical College, Vellore, Tamil Nadu, India.

ABSTRACT
Seronegative spondyloarthropathy is a group of chronic inflammatory rheumatic diseases that predominantly affect the axial skeleton. Involvement of sacroiliac joint is considered a hallmark for diagnosis of seronegative spondyloarthropathy and is usually the first manifestation of this condition. It is essential for the radiologist to know the computed tomography (CT) and magnetic resonance imaging (MRI) features of spondyloarthropathy-related sacroiliitis as imaging plays an important role in diagnosis and evaluation of response to treatment. We present a pictorial essay of CT and MRI imaging findings in seronegative spondyloarthropathy-related sacroiliitis in various stages and highlight common differentials that need to be considered.

No MeSH data available.


Related in: MedlinePlus