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Sacroiliitis
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Sacroiliitis

Hi!
I have spondyloarthritis from last 3 years. My recent MRi report states that there are fat replacement in the SI joints. What does this mean? Is it something to worry about? I am unable to find any results for this in the net also.
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3 Comments Post a Comment
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1711789_tn?1361311607
Hi there!

The MRI probably refers to ‘marrow fat replacement’ which is a common association of spondyloarthropathies along with bone marrow edema, joint erosions, and ankylosis; though it may be seen in a few normal individuals as well as a few non-specific conditions.
Hope this was helpful.

Take care!
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Thank you doctor for your reply. I want to know one more thing. What are the non-specific conditions related with fat replacement of the SI joints?
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1711789_tn?1361311607
Hi there!

Aside being normal in some cases, few drugs, chronic infections, radiation, demineralization, increased age, a few hormonal/ endocrine disorders etc. can cause similar changes. Similar appearance can also be caused due to issues that interfere with signal intensity on the MRI.
Hope this is useful.

Take care!

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