Learning Radiology xray montage

Osteitis Condensans Ilii

  • General Considerations

    • Benign sclerosis of the iliac side of the sacroiliac joints
    • Bilaterally symmetric
      • Rarely unilateral
    • Radiologic diagnosis discovered serendipitously
    • Usually found in young females who have had several children but also may be seen in males
    • Related to remodeling of bone following stress across the sacroiliac joint
      • Other theories of etiology are that it is related to a urinary tract infection, or that it
      • May be related to a form of inflammatory arthritis

    Clinical findings

      • Rarely symptomatic but may be mildly painful
      • May have morning stiffness and polyarthralgia

    Imaging findings

      • Sclerosis is frequently triangular in shape with the base pointing inferiorly
      • Not to be confused with a sacroiliitis
        • Sacroiliac joint is intact in osteitis condensans ilii
        • Sclerosis involves only iliac side of joint in osteitis condensans ilii
      • Outer margin of sclerosis is usually well-defined
      • If in doubt, oblique views of the SI joints will show the joint to be intact and the sclerosis on only iliac side
    • May spontaneously resolve

Osteitis Condensans Ilii

Osteitis Condensans Ilii. This is a single axial image from a CT scan of the pelvis demonstrating sclerosis (blue arrows) on only the iliac side of the sacroiliac joints. The joints themselves are intact. The sacral side of the joint is normal.
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Osteitis condensans ilii WC Peh, MD Imaging Consultation American Journal of Orthopedics