Hip Impingement after Anterior Inferior Iliac Spine Avulsion Fractures: A Case Report with Review of the Literature

Table 1

List of publications of anterior inferior iliac spine avulsion fractures treated nonoperatively with subsequent development and surgical excision of heterotopic ossification at the site of fracture.

Authors	Diagnosis	ROM prior to surgery/after surgery	ORIF of AIIS fragment?	Approach	Return to sport	Follow-up/recurrence
Alhaneedi et al. [4]	Femoroacetabular impingement	N/A	No	Open	N/A	2 years
Larson et al. [10]	Femoroacetabular impingement	110 degrees flexion/125 degrees flexion	No	Arthroscopic	N/A	1.5 years
Nakano et al. [12]	Extra articular subspine impingement	N/A	No	Arthroscopic	N/A	1 year/none
Carr et al. [13]	Extra articular subspine impingement	N/A	Yes	Open	5 months	1 year/none
Novais et al. (case 1) [14]	Extra articular subspine impingement	90 degrees flexion, 10 degrees internal rotation/100 degrees and 30 degrees	No	Open	6 months	26 months
Novais et al. (case 2) [14]	Extra articular subspine impingement	100 degrees flexion/120 degrees flexion and 35 degrees internal rotation	No	Open	6 months	28 months
Shibahara et al. [15]	Extra articular subspine impingement	90 degrees flexion, 20 degrees internal rotation, 30 degrees external rotation	No	Arthroscopic	4 months	N/A
Rajasekhar et al. (case 1) [16]	Hip pain with flexion	“Within normal limits”	Yes	Open	N/A	2.5 years
Matsuda and Calipusan [17]	Femoroacetabular impingement	N/A	No	Arthroscopic	N/A	18 months