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Acetabular paralabral cysts demonstrating perineural propagation
John Hynes1, Avneesh Chabra2,3, Mina Guirguis2
1Department of Radiology, National Orthopaedic Hospital of Ireland, Cappagh, Ireland.
The British Journal of Radiology
|June 28, 2022
Summary
Acetabular paralabral cysts can extend along nerves, causing hip pain and dysfunction. Image-guided treatments often improve symptoms in these uncommon cases.
Area of Science:
- Orthopedic Surgery
- Radiology
- Neurology
Background:
- Acetabular paralabral cysts are typically associated with labral tears.
- Uncommon presentations involve extension into soft tissues or along peripheral nerves, leading to pain and dysfunction.
Purpose of the Study:
- To evaluate the clinical and MRI presentations of acetabular paralabral cysts with perineural propagation.
- To describe the characteristics and outcomes of these rare cases.
Main Methods:
- Retrospective cross-sectional study of electronic health records.
- Analysis of clinical and MRI features by musculoskeletal radiologists.
- Tabulation of outcomes for patients with perineural propagation.
Main Results:
- 14 cases identified with a mean age of 56.9 years (female:male ratio 1:2.6).
- Common symptoms included hip pain (71.4%), with sciatic nerve involvement in 35.7%.
- Most cysts were multilocular and T2 hyperintense; labral tears were present in 78.6%.
Conclusions:
- Paralabral cysts with perineural propagation present uniquely and uncommonly.
- Image-guided interventions and surgical treatments generally lead to symptom improvement.
