Hip Joint Osteochondroma: Systematic Review of the Literature and Report of Three Further Cases

Table 1

Basic demographics and clinical data of three patients included in this report.

Patient	Age years	Gender	Presentation	Loss of range of motion	Radiographic finding	Location of osteochondroma	Procedure(s)
Case 1	15	Male	Left hip pain with prolonged activities.	Left hip: Flexion: 30°; Abduction: 20°	Left hip subluxation secondary to femoral neck osteochondroma and acetabular dysplasia.	Anterior femoral neck.	Excision of osteochondroma and the Bernese periacetabular osteotomy through a modified Smith-Peterson approach.
Case 2	4	Female	Difficulty with movement of left hip noted by patient’s mother.	Left hip: Internal rotation: 10°; External rotation: 15°; Flexion: 20°; Abduction: 30°	(1) Left hip subluxation secondary to femoral neck osteochondroma and acetabular dysplasia.; (2) Bilateral coxa valga.	Medial femoral neck and posterior intertrochanteric region.	At 4 years of age: proximal femur VDRO^1 with excision of osteochondroma and application of DHS^2 through lateral approach.; At 8 years of age: left modified Dega osteotomy through anterior approach, removal of DHS, VDRO^1, and application of LCP^3 through lateral approach.; At 9 years of age: removal of LCP.
Case 3	13	Female	Left hip pain with activity and sensation of locking.	Left hip: Internal rotation: 15°; External rotation: 10°; Abduction: 20°	Left hip subluxation secondary to femoral neck, acetabular osteochondroma, and acetabular dysplasia.	Acetabular fossa and anterior femoral neck.	Excision of the femoral neck osteochondroma and Shelf procedure through anterior approach.

 ¹Varus derotational osteotomy. ²Dynamic hip screw. ³Locking compression plate.