ePoster #1006 - ISHA Annual Scientific Meeting 2016

Clinical Outcomes For The Treatment Of Amorphous Calcification Of The Labrum During Hip Arthroscopy With Minimum Two-Year Follow-Up

Itay Perets, MD, Westmont, IL UNITED STATES
David E. Hartigan, MD, Westmont, IL UNITED STATES
John P. Walsh, MA, Westmont, IL UNITED STATES
Edwin Chaharbakhshi, BS, Hinsdale, IL UNITED STATES
Mary R. Close, BS, Westmont, IL UNITED STATES
Benjamin G. Domb, MD, Chicago, IL UNITED STATES

American Hip Institute, Westmont, IL, UNITED STATES

FDA Status Not Applicable

Summary: The treatment of amorphous calcification as a part of hip arthroscopy procedures demonstrates statistically significant improvements in PROs and VAS at a minimum two year follow-up post-operatively.

Abstract:
Background: Calcifications have been documented throughout the human body after repetitive trauma and/or degeneration. Amorphous calcifications (AC) of the hip are uncommon entities, and their etiology and outcomes after treatment remain unclear. Purpose: This study’s purpose was to evaluate clinical outcomes, satisfaction, demographics, and radiographic findings for patients whose hip arthroscopies involved AC excision accompanied by labral and/or femoroacetabular impingement (FAI) treatment. Methods: We reviewed 12 patients who underwent primary hip arthroscopy involving surgical excision of AC deposit in the antero-superior labral-capsular recess between October 2008 and July 2013. Demographics, radiographic findings, intra-operative findings, and procedures were reviewed. Minimum follow-up was two years and included visual analog scale (VAS) for pain, patient satisfaction, and the following patient reported outcome (PRO) scores: modified Harris hip score (mHHS), Hip Outcomes Score Sport-Specific Subscale (HOS-SSS) and Non-Arthritic Hip Score (NAHS). Results: The cohort included 12 females with mean age of 39.9, and mean follow-up time of 39 (24–72) months. Survivorship rate was 92%, with one hip converting to total hip replacement after two years. Statistically significant improvements from pre-operative to 2 year post-operative PRO scores were found in NAHS (20.2), HOS-SSS (29.1), and VAS (-3.1). While mHHS improved, it was not found to be statistically significant. Eight of 11 patients in this cohort (72.7%) had satisfaction=7. Post-operative radiographic findings showed no subsequent AC in all 12 hips. There were no complications and no revisions were reported. Two of 11 (18.2%) patients had histories of hypothyroidism at the time of surgery, which was found to be significantly different (p=0.03) compared to a large census (4.6%). Conclusions: The treatment of AC as a part of hip arthroscopy procedures demonstrates statistically significant improvements in PROs and VAS at a minimum two year follow-up post-operatively. Hypothyroidism may be a risk factor for the development of AC, and this relationship should be further investigated.