Prevalence of rapidly progressive osteoarthritis of the hip following intra-articular steroid injections

INTRODUCTION

Numerous studies have indicated that intra-articular steroid injections to the hip are beneficial for short-term pain relief. However, recent studies have drawn concerns of rapidly progressive osteoarthritis of the hip (RPOH) following intra-articular steroid injections. The prevalence of RPOH following intra-articular steroid injections varies widely in the literature.

OBJECTIVE

To identify the prevalence of RPOH following intra-articular steroid injections, and to compare baseline characteristics between patients with and without RPOH.

DESIGN

Case series.

SETTING

Tertiary academic hospital.

PATIENTS

A total of 924 patients (median [interquartile range; IQR] age: 59 [45-70] years; 579 female) who received an intra-articular hip steroid/anesthetic injection from January 2016 to March 2018 and had available pre- and post-injection imaging (prior to surgical intervention) were included in the study.

INTERVENTIONS

Baseline and injection-related data-including demographics, age, body mass index, medical history, laterality, and steroid type-were collected from electronic medical records.

MAIN OUTCOME MEASURES

Post-injection RPOH was determined via imaging review by a physiatry fellow, followed by an attending physiatrist and a musculoskeletal radiologist to confirm findings.

RESULTS

The majority of patients received unilateral injections into the hip, and the most common steroids used were triamcinolone and methylprednisolone. Review of pre- and post-injection imaging revealed 26 cases of RPOH, for an overall prevalence of 2.8% (95% confidence interval [CI] 1.9%-4.1%). Compared to those without RPOH, patients with RPOH were significantly older (median age [IQR]: 64 [60-73] vs. 59 [44-70] years, p = .003) and had a shorter duration of symptoms prior to their injections (median [IQR]: 3 vs. 12 [6-36] months, p < .001). Adjusted regression analyses showed that age was associated with greater odds of RPOH (odds ratio [OR], 95% CI: 1.04, 1.01 to 1.07; p = .003).

CONCLUSIONS

The prevalence of RPOH following intra-articular steroid injections into the hip was lower than previously reported but still clinically relevant. This should be considered when counseling patients prior to intra-articular hip steroid injections.

Tropical Achilles Tendinopathy: Sea Urchin Spine Injury

Sea urchin spine injuries have been reported in the hand and foot, but there are no published cases in the Achilles tendon. We report an unusual case of Achilles tendinopathy secondary to sea urchin spine injury. The patient had Achilles tendon pain that increased over time and was worsened with weightbearing activity. His left ankle plantarflexion was limited by pain. He had received medical care 3 months earlier to remove sea urchin spines after stepping on a long-spined sea urchin. Bedside ultrasound and imaging studies revealed that there were foreign bodies related to sea urchin spines on the surface of the tendon. The patient was given education about proper footwear and activity modification. His symptoms resolved over time, and he avoided surgical intervention.

Fluoroscopically guided caudal epidural steroid injections for axial low back pain associated with central disc protrusions: a prospective outcome study

PURPOSE

To determine if axial low back pain (LBP) associated with central disc protrusions can be improved by caudal epidural steroid injections (ESIs).

METHODS

Adults with chronic (> 3 months) moderate-to-severe axial LBP with L4-5 and/or L5-S1 central disc protrusions were enrolled in this prospective study. Participants underwent caudal ESIs under standard-of-care practice. The numerical rating scale (NRS) pain score, modified North American Spine Society satisfaction, and Roland Morris Disability Questionnaire (RMDQ) were collected at one week, one month, three months, six months, and one year post-injection. Pre-injection magnetic resonance images were assessed by a musculoskeletal radiologist.

RESULTS

Sixty-eight participants (42 males, 26 females) were analyzed. There were statistically significant improvements in all outcome measures at all follow-up time points, with the exception of NRS best pain at six months. Clinically significant improvements in outcomes were observed at various time points: at three months and one year for current pain; at one week, one month, three months, six months, and one year for worst pain; and at one month and one year for RMDQ. The proportion of satisfied participants ranged from 57 to 69% throughout the study. No adverse events were observed.

CONCLUSIONS

This study demonstrated significant improvements in pain and function following caudal ESIs in a cohort of axial LBP with associated central disc protrusions. Further studies, including the use of randomized controlled trials, are needed to determine the ideal subset of candidates for this treatment and to explore additional applications that caudal ESIs may have for chronic LBP.

Rehabilitation and Prevention of Proximal Hamstring Tendinopathy

Proximal hamstring tendinopathy (PHT) comprises a small but significant portion of hamstring injuries in athletes, especially runners. PHT is a chronic condition that is clinically diagnosed but can be supported with imaging. The main presenting complaint is pain in the lower gluteal or ischial region that may or may not radiate along the hamstrings in the posterior thigh. There is little scientific evidence on which to base the rehabilitation management of PHT. Treatment is almost always conservative, with a focus on activity modification, addressing contributing biomechanical deficiencies, effective tendon loading including eccentric training, and ultrasound-guided interventional procedures which may facilitate rehabilitation. Surgery is limited to recalcitrant cases or those involving concomitant high-grade musculotendinous pathology. The keys to PHT management include early and accurate diagnosis, optimal rehabilitation to allow for a safe return to preinjury activity level, and preventative strategies to reduce risk of reinjury.