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Enlarged acetabular labra in the Pima Indians
R Hirsch1, R J Fernandes, S R Pillemer
1National Institute of Arthritis and Musculoskeletal and Skin Diseases, Bethesda, MD, USA. RRH7@CDC.GOV
The Journal of Rheumatology
|February 7, 1998
Summary
Acetabular labral enlargement is common in Pima Indians, particularly in females, and is not linked to age or other health factors. Recognizing this variant is crucial as it can resemble fractures or osteophytes.
Area of Science:
- Radiology
- Epidemiology
- Orthopedics
Background:
- Acetabular labral enlargement is a radiographic finding.
- Its prevalence and associations in specific populations require investigation.
Purpose of the Study:
- To describe the epidemiology of acetabular labral enlargement in Pima Indians.
- To analyze associations between acetabular labral enlargement and demographic/clinical variables.
Main Methods:
- Pelvis radiographs of 761 Pima Indians (aged ≥45) were analyzed.
- Exclusion of unreadable radiographs and those with hip osteoarthritis (OA).
- Radiographs were assessed for enlarged acetabular labra using individual feature grading.
Main Results:
- Enlarged acetabular labra were found in 16% of participants without OA.
- A significant association was observed with female sex.
- No significant associations were found with age, BMI, diabetes, or insulin levels.
Conclusions:
- Acetabular labral enlargement is a common finding in this Pima Indian cohort.
- This variant is not associated with age and differs in appearance from other acetabular margin anomalies.
- Awareness of acetabular labral enlargement is important for accurate diagnosis, as it can be mistaken for fractures or osteophytes.