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 …

In the last 20 years, femoroacetabular impingement has been at the forefront of clinical
practice as a cause of hip pain in young adults. As arthroscopic techniques for the hip …

Background: The clock face has been employed to define the position of labral pathology in
relation to identifiable arthroscopically relevant acetabular landmarks. The purpose of this …

Purpose Femoroacetabular impingement (FAI) has been well described in recent years as
one of the major causes of hip pain potentially leading to acetabular labral tears and …

Background: Subspinous impingement of the anterior inferior iliac spine (AIIS) on the
femoral head-neck junction is increasingly recognized as a source of hip impingement. A …

Background The MRI manifestations of subspine impingement (SSI) other than morphologic
features of anterior inferior iliac spine (AIIS) have not been extensively explored and …

Background Subspine impingement is a recognized source of extraarticular hip
impingement. Although CT-based classification systems have been described, to our …

In this review, we bring to the attention of the reader three relatively unknown types of hip
impingement. We explain the concept of low anterior inferior iliac spine (AIIS) impingement …

Purpose To compare ultrasound examination to false profile radiographs in identification
and classification of AIIS morphology. The study hypothesis stated that sonographic imaging …

Backgound Despite the fact that femoral impingement against the anterior inferior iliac spine
(AIIS) is increasingly recognized, there is no description of morphologic features of the AIIS …