Anterior Inferior Iliac Spine (AIIS) and Subspine Hip Impingement.

Muscles Ligaments Tendons J. 2016 Dec 21;6(3):324-336. doi: 10.11138/mltj/2016.6.3.324. eCollection 2016 Jul-Sep.

Abstract

BACKGROUND:

Abnormal morphology of the anterior inferior iliac spine (AIIS) and the subspine region of the acetabular rim are increasingly being recognised as a source of symptomatic extra-articular hip impingement. This review article aims to highlight important differences in the pathogenesis, clinical presentation and management of extra-articular hip impingement from both the AIIS and subspine bony regions, and the outcome following surgical intervention.

METHODS:

A literature review was undertaken to examine the supporting evidence for AIIS and subspine hip impingement. A narrative account of the Author’s professional experience in this area, including operative technique for arthroscopic correction, is also presented.

RESULTS:

Abnormal morphology of the AIIS and subspine region has been classified using cadaveric, radiological and arthroscopic means; the clinical presentation and operative treatment has been documented in several case series studies. Dual pathology is often present – recognition and treatment of both intra- and extra-articular components are necessary for good postoperative outcome.

CONCLUSIONS:

AIIS and sub-spine hip impingement should be considered as distinct pathological entities, which may also co-exist. Symptom relief can be expected following arthroscopic deformity correction with the treatment of concomitant intra-articular pathology. Failure to recognise and treat the extra-articular component may affect postoperative outcome.

LEVEL OF EVIDENCE: V

KEYWORDS:

AIIS; anterior inferior iliac spine; extra-articular impingement; femoro-acetabular impingement; hip arthroscopy; hip impingement

 

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Anterior Inferior Iliac Spine (AIIS) and Subspine Hip Impingement

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