This site is targeted at medical and radiology professionals, contains user contributed content, and material that may be confusing to a lay audience. Use of this site implies acceptance of our Terms of Use.

Osteitis condensans ilii

Osteitis condensans ilii is characterised by benign sclerosis of the ileum adjacent to the sacroiliac joint. It is typically bilateral and symmetrical, and tends to be triangular in shape. The sacroiliac joint is not involved. It is most commonly seen in multiparous females, however the condition is by no means restricted to multiparous females 2.


The underlying aetiology is believed to be mechanical stress across the SI joint.

Clinical presentation

It is usually asymptomatic but uncommonly may cause lower back pain.

Radiographic features

Plain film and CT

Sclerosis of the ilial part of sacroiliac joint is seen. Sacrum is not involved.

Differential diagnosis

The main differential diagnosis is a sacroiliitis, but with osteitis condensans ilii the SI joint is normal with no irregularity, erosions or loss of joint space.

Updating… Please wait.

 Details successfully updated.

Error Unable to process the form. Check for errors and try again.

 Thank you for updating your details.