Clin Orthop Surg.  2019 Sep;11(3):275-281. 10.4055/cios.2019.11.3.275.

Arthroscopic Treatment for Femoroacetabular Impingement with Extraspinal Diffuse Idiopathic Skeletal Hyperostosis

• Hwang JM
• Hwang DS
• Kang C
• Lee WY
• Lee GS
• Lee JK
• Kim YK

• KMID: 2462555
• DOI: http://doi.org/10.4055/cios.2019.11.3.275

Abstract

BACKGROUND
Patients with extraspinal diffuse idiopathic skeletal hyperostosis (DISH) involving the hip joint have symptoms like femoroacetabular impingement (FAI). To date, no reported study has determined the clinical outcomes of arthroscopic treatment in extraspinal DISH involving the hip joint.
METHODS
A total of 421 hips with FAI that underwent arthroscopic treatment were reviewed retrospectively. We determined the extraspinal involvement of DISH with three-dimensional computed tomography (3D-CT) and simple radiography of the pelvis and hip joint. Clinical outcomes were evaluated at a minimum of 2 years postoperatively. The visual analog scale score (VAS), modified Harris hip score (MHHS), and hip outcome score-activity of daily living scale (HOS-ADL) were used, and hip range of motion (ROM) was evaluated pre- and postoperatively and at the time of the final follow-up.
RESULTS
Among the 421 hips (372 patients) with FAI that underwent arthroscopic treatment, 17 hips (12 patients, 4.04%) had extraspinal DISH on the hip joints. The mean age of the patients was 51.5 years. The 3D-CT scans and simple radiographs showed extraspinal DISH on multiple points around the pelvis and hip joint. Nine of the 17 hips (seven of 12 patients) had spinal DISH. At the final follow-up, VAS, MHHS, and HOS-ADL improved significantly from 6.5, 65.3, and 66.6, respectively, to 1.2, 87.8, and 89.5, respectively, and hip flexion and internal rotation improved significantly from 97.7° and 7.9°, respectively, to 117.1° and 18.2°, respectively.
CONCLUSIONS
This study has demonstrated that extraspinal DISH involving the hip joint could lead to FAI, and arthroscopic treatment could result in relief of symptoms, including pain and ROM limitation, in extraspinal DISH patients.

Keyword

Arthroscopy; Hip; Diffuse idiopathic skeletal hyperostosis

MeSH Terms

Arthroscopy
Femoracetabular Impingement*
Follow-Up Studies
Hip
Hip Joint
Humans
Hyperostosis, Diffuse Idiopathic Skeletal*
Pelvis
Radiography
Range of Motion, Articular
Retrospective Studies
Visual Analog Scale

Figure

• 

  Fig. 1 Preoperative simple anteroposterior (A) and frog-leg (B) radiographs of the hip joint showing hyperostosis on the anterosuperior acetabular rim (arrows) of both sides with sparing of the joint space and surface.

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  Fig. 2 Arthroscopic views from the anterolateral portal. (A) Hyperostosis on the anterosuperior side of the acetabular rim (asterisk). (B) Decompression of hyperostosis using a burr (asterisk). (C) After decompression of hyperostosis.

• 

  Fig. 3 (A) Preoperative three-dimensional computed tomography (3D-CT) view of the hip joint in 30° internal rotation showing mixed-type femoroacetabular impingement and hyperostosis (arrow) on the anterosuperior acetabulum below the anterior inferior iliac spine. (B) Postoperative 3D-CT view of the hip joint in 30° internal rotation showing the results of femoroplasty (arrowhead) and acetabuloplasty with decompression of hyperostosis (arrow).

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