Fact-sheet: Osteitis condensans ilii
Updated on 10/06/2017 at 4:39 PM
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Definition
Uni- or bilateral triangular iliac osteosclerosis with mild involvement of the sacral aspect, occurring mainly in women after pregnancy
Clinical features
Often asymptomatic
Possible mechanical sacroiliac pain
Radiography
Triangular osteosclerosis of the middle and lower thirds of the sacroiliac joints
Preserved joint space
Relative sparing of the sacral aspect
CT
Incidental finding Homogeneous iliac sclerosis with a regular, well-defined outer margin, often > 5 mm Intact joint space Sacral sclerosis may be present but less pronounced than on the iliac side No osteophytes
MRI
T1 and T2 hypointensity of the iliac and sometimes sacral margins
Differential diagnosis
- Inflammatory (rheumatic) sacroiliitis