5.4.1 Hip Soft Tissue Disorder - Part 1

Hip Soft Tissue Disorder - Part 1

Introduction

Hello, my name is Dr. Kyle Adams. This presentation focuses on hip region soft tissue disorders, detailing several common conditions associated with hip area pain, along with their etiology, identification, and evidence-based treatments. The objective of this discussion is to provide an in-depth understanding of these conditions.

Objectives

Participants are encouraged to familiarize themselves with the goals of this lecture, which emphasize the importance of differential diagnosis when assessing individuals with hip pain. It is critical to assess related anatomical regions, including the lumbar spine, pelvis, and knee, as they may refer pain into the hip joint. Conversely, hip pathologies can also result in referred pain to these areas as well as to the ankle region. This concept is encompassed by the idea of regional interdependence.

Importance of Differential Diagnosis

Awareness of differential diagnosis involving hip pain is essential. Conditions beyond the musculoskeletal system—including gastrointestinal and urogenital systems—must be screened as potential contributors. Attention must be paid to red flag conditions, such as cancer.

Musculoskeletal Causes

A detailed, albeit partial, list of potential musculoskeletal causes contributing to hip pain is presented. A referenced table from Tiber et al. (2008) categorizes structures causing pain into intra-articular and extra-articular causes. This classification aids in thorough physical examinations.

Physical Examination Framework

A systematic approach should guide hip examinations, incorporating relevant tests and measures to enhance accuracy and reliability in generating hypotheses regarding pain generators in the hip region.

Extra-Articular Causes of Hip Pain

Key anatomical structures around the hip include multiple bursa, with three being particularly common:

  • Ischial Bursa: Often aggravated by prolonged sitting or direct impact to the ischial tuberosity.

  • Iliopectineal Bursa: Located in the anterior hip region, irritated by repetitive hip flexion; differentiating bursa irritation from hip flexor tissue irritation may be challenging.

  • Trochanteric Bursa: Located laterally at the greater trochanter.

There has been an ongoing shift toward referring to trochanteric bursitis as greater trochanteric pain syndrome. This change acknowledges that many individuals with this syndrome do not exhibit the four classic signs of inflammation (redness, warmth, swelling), with pain being the predominant symptom.

Understanding Greater Trochanteric Pain Syndrome

The condition usually presents with lateral hip pain exacerbated by lying on the affected side and weight-bearing activities like walking or climbing stairs, which involve the gluteus minimus and medius. Inflammation of the bursa can arise from direct trauma to the lateral hip or friction from the IT band. The three bursa associated with this syndrome include

  • Subgluteus Minimus

  • Subgluteus Medius

  • Subgluteus Maximus (largest, often referred to as the trochanteric bursa).

Conservative Treatment Approaches

First-line conservative treatments generally include:

  • Rest

  • Ice

  • Compression

  • Elevation

  • Corticosteroid injections (for acute inflammation).
    Research shows that physical therapy's effectiveness for persistent conditions may be limited. However, a comprehensive approach to address impairments across the kinetic chain is essential for effective treatment.

Additionally, low-level evidence suggests shockwave therapy may be beneficial, but the lack of a standardized treatment protocol hampers its widespread application. Surgical interventions should be considered as a last resort, with one-year post-surgical outcomes being reasonably promising post-debridement and IT band release.

Snapping Hip Syndrome (Coxa Saltans)

When untreated, greater trochanteric pain syndrome can evolve into snapping hip syndrome (coxa saltans), characterized by the sensation of snapping around the hip during motion. Causes can be categorized as follows:

  • External Causes: Most commonly related to trochanteric pain syndrome. Often assessed in conjunction with spinal and hip disorders.

  • Internal Causes: May involve the iliopsoas tendon, thickening of the iliopsoas bursa or capsule, iliofemoral ligament, or proximal hamstrings; these can snap over anatomical landmarks like the iliopectineal eminence or femoral head.

  • Intra-Articular Causes: Include labral tears, loose bodies, and other structural abnormalities of the hip joint.

The condition manifests variably, with approximately 45% of ballet dancers experiencing hip complaints presenting with snapping, although only 30% report pain.

Assessing Internal Snapping Hip

This subset is the leading cause of groin pain in runners, typically presenting as anterior groin pain with resisted hip flexion and snapping during hip extension from a flexed position. The inclusion of hip extensors during movement often alleviates snapping symptoms. Dynamic ultrasound imaging is particularly useful for identifying the snapping tissues through various hip movements, revealing the anatomical relationships between involved structures.

Treatment Approaches for Snapping Hip Syndrome

Treatment protocols for both internal and external snapping hip syndromes mimic those for greater trochanteric pain syndrome, emphasizing iliopsoas stretches and potentially incorporating hip mobilization. Surgery is rare due to effective conservative management, but when necessary, procedures include tendon lengthening or debridement, yielding approximately 80% success, with concerns around post-operative muscle weakness or sensory loss.

Gluteal Tendinopathies

Following the discussion of snapping hip, attention is shifted to common conditions affecting the gluteus medius and minimus tendons, which are sometimes referred to as the "rotator cuff of the hip." Symptoms range from acute tendinitis to persistent tendinopathy, with potential for tearing similar to rotator cuff injuries. Gluteal conditions are observed more frequently in women due to differences in pelvic anatomy.

Patients typically report dull lateral hip pain with tenderness along the gluteal insertion, often accompanied by hip abduction weakness. Various provocative tests for diagnosing gluteal tendinopathy have been studied, including:

  • 30-second Single Leg Stance Test: 100% sensitivity and 97.3% specificity for lateral hip pain.

  • Resisted Lateral Derotation Test: Also displays high diagnostic utility.

To conduct the resisted lateral derotation test, the clinician flexes the patient's hip to 90 degrees, externally rotates the hip at 90 degrees of flexion, and resists hip internal rotation while assessing for lateral pain.

Imaging and Diagnosis

Imaging alone is insufficient for diagnosing tendon pathologies, as many individuals with such conditions are asymptomatic. X-rays are unhelpful in revealing tendon abnormalities but can exclude other serious conditions. MRIs are valuable for identifying peritendinitis and tendinosis, although ultrasound imaging offers better sensitivity and visual confirmation of pathology, despite MRIs being the gold standard.

Treatment for Gluteal Conditions

Effective management for gluteal tendon pathologies includes patient activity modifications to alleviate undue stress on the tendon, alongside progressive exercises and motor control training. If conservative rehabilitation fails, corticosteroid injections may aid recovery, with endoscopic repairs showing promise for surgical candidates. Research on tendon debridement remains limited but suggests potential efficacy in specific cases.

Conclusion

The lecture concludes with a brief overview of the next topics to be discussed, including nerve entrapments, thigh muscle strains, athletic pubalgia, and osteitis pubis. Thank you for your attention.