Septic arthritis of sacroiliac joint

Case contributed by Mohamed Abdel-Tawab Mohamed
Diagnosis probable

Presentation

Acute right-sided limp with severe agonizing pain on depending on the right lower limb and limited range of movement of acute onset.

Patient Data

Age: 70 years
Gender: Male
This study is a stack
Coronal T2
fat sat
This study is a stack
Coronal
T2
This study is a stack
Axial T2
fat sat
This study is a stack
Axial
T2
This study is a stack
Axial
T1
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Info

Effusion of the right sacroiliac joint with oedema at soft tissues anterior to the joint extending beneath the right iliacus muscles. No subchondral and bone marrow oedema.

The dark shadow at T2 axial images is saturation band that suppresses the flow related artifact coming from structures adjacent to the area of interest.

Case Discussion

Septic arthritis is a pyogenic inflammation of the joint. Sacroiliac joint is a relatively uncommon location of septic arthritis. The presence of localised fluid continuous with the sacroiliac joint in patient with agonizing pain raises the possibility of septic sacroiliac arthritis.

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