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J Arthroplasty. 2014 Dec;29(12):2468-72. doi: 10.1016/j.arth.2014.06.017. Epub 2014 Jun 28.

Inversion of the acetabular labrum triggers rapidly destructive osteoarthritis of the hip: representative case report and proposed etiology.

Author information

1
Department of Orthopaedic Surgery, Kanazawa Medical University, Kahoku-gun, Japan.
2
Department of Pathology and Medical Laboratory, Kanazawa Medical University, Kahoku-gun, Japan.

Abstract

The pathophysiology of rapidly destructive osteoarthritis (OA) of the hip is unknown. This study documented cases of inversion of the acetabular labrum, which has clinicoradiologic features similar to those of initial-stage rapidly destructive hip OA. Our study was based on a prospective review of data for 9 patients with rapidly destructive hip OA. Intraoperative findings showed that the anterosuperior portion of the acetabular labrum had inverted into the articular space, along with many fragments of articular cartilage, in all patients. Subchondral insufficiency fractures of the femoral heads were seen just under the inverted labra in 8 of the 9 patients. Inversion of the acetabular labrum may be involved in rapid joint-space narrowing and subchondral insufficiency fracture in rapidly destructive hip OA.

KEYWORDS:

acetabular labrum; inversion; joint-space narrowing; rapidly destructive osteoarthritis of the hip; subchondral insufficiency fracture

PMID:
25081509
DOI:
10.1016/j.arth.2014.06.017
[Indexed for MEDLINE]

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