Osteitis Condensans Ilii and Acetabular Labral Tear after Pregnancy: A Case Report

Low back and hip pain are common musculoskeletal complaints. Due to its reported low prevalence, osteitis condensans illi (OCI) is not always considered in the differential diagnosis for low back or hip pain and is often difficult to distinguish based on symptoms alone. OCI is often diagnosed by imaging and is characterized by sclerosis of the ilium with an otherwise normal sacroiliac joint that can be seen in post-partum patients. It can be easily confused for sacroiliitis, spondyloarthropathies, and metastatic bone lesions. This is the case of a 35 year old woman with a 5-year history of right hip pain which began after her first pregnancy who was diagnosed with OCI and additional acetabular labral tear. We report the defining clinical and imaging features of OCI to help guide clinicians in diagnosing and managing this condition.