Courtesy: Prof Nabil Ebraheim, University of Toledo, Ohio, USA

Gluteus Medius Tendon Tears

Introduction

Gluteus medius tendon tears are an increasingly recognized cause of lateral hip pain and disability. Historically, many of these patients were diagnosed with trochanteric bursitis, but advances in imaging and understanding of hip biomechanics have shown that gluteus medius pathology is a common underlying cause.

Gluteus medius tears form an important part of Greater Trochanteric Pain Syndrome (GTPS) and should be considered in any patient with persistent lateral hip pain.

Greater Trochanteric Pain Syndrome (GTPS)

GTPS represents a spectrum of disorders affecting the peritrochanteric region.

This continuum includes:

Trochanteric bursitis
Gluteus medius tendinitis
Gluteal tendinosis
Partial-thickness tendon tears
Full-thickness tendon tears
Chronic retracted tears with muscle atrophy

Recognition of this spectrum is important because treatment and prognosis vary depending on the stage of disease.

Etiology and Risk Factors

Gluteus medius tendon tears are most commonly seen in older adults and are frequently associated with degenerative changes around the hip.

Common Risk Factors

Advanced age
Hip osteoarthritis
Degenerative tendon disease
Chronic overuse
Altered hip biomechanics

Many patients remain asymptomatic during the early stages of disease, allowing gradual progression before diagnosis.

Clinical Presentation

Symptoms

Patients typically present with:

Chronic lateral hip pain
Insidious onset of symptoms
Pain radiating to the buttock
Pain radiating to the lower back
Difficulty with prolonged walking or standing

Physical Examination Findings

Common examination findings include:

Tenderness over the greater trochanter
Limping gait
Weakness of hip abduction
Positive Trendelenburg sign
Trendelenburg gait in advanced cases

Why Diagnosis Is Often Missed

Diagnosis may be delayed for months or even years because:

Symptoms are often vague and nonspecific
Hip abductor strength may remain normal or only mildly reduced
Findings may mimic trochanteric bursitis
Patients frequently undergo repeated treatment without addressing the underlying tendon pathology

Persistent “trochanteric bursitis” that fails to improve should raise suspicion for a gluteus medius tendon tear.

Differential Diagnosis

Several conditions can produce symptoms similar to gluteus medius pathology and should be excluded.

Important Differential Diagnoses

Stress fractures
Avascular necrosis of the femoral head
Hip osteoarthritis
Femoroacetabular impingement (FAI)
Lumbar spine pathology
Lumbar radiculopathy

A comprehensive clinical assessment is essential before confirming the diagnosis.

Hip Abductor Biomechanics

Primary Hip Abductors

The hip abductor mechanism consists primarily of:

Gluteus medius
Gluteus minimus

These muscles play a critical role in pelvic stability during the stance phase of gait.

Consequences of Abductor Weakness

When the abductors become dysfunctional:

Trendelenburg Sign

The pelvis drops on the contralateral side during single-leg stance.

Abductor Lurch

To compensate for weakness, patients lean their trunk toward the affected side.

This compensatory mechanism:

Reduces the abductor moment arm
Decreases muscular demand
Helps maintain balance during walking

Diagnosis

Clinical Suspicion

The diagnosis should be suspected in patients with:

Chronic lateral hip pain
Persistent symptoms despite treatment
Recurrent or refractory trochanteric bursitis

Imaging

MRI: Investigation of Choice

MRI is the most useful imaging modality for evaluating gluteus medius pathology.

MRI can identify:

Tendinosis
Partial-thickness tears
Full-thickness tears
Tendon retraction
Fatty degeneration
Muscle atrophy

MRI remains valuable even in patients who have undergone previous hip arthroplasty.

Surgical Anatomy

Understanding tendon insertion anatomy is essential when planning repair.

Greater Trochanter Facets

Anterior Facet

Insertion of the gluteus minimus tendon.

Lateral Facet

Insertion of the gluteus medius tendon.

Superoposterior Facet

Additional insertion of the gluteus medius tendon.

Posterior Facet

Insertion area for the gluteus maximus.

Knowledge of these insertion sites guides anchor placement and surgical repair techniques.

Natural History

Gluteus medius tendon disease is generally progressive.

Typical progression includes:

Tendinosis
Partial-thickness tear
Full-thickness tear
Tendon retraction
Fatty infiltration
Muscle atrophy

Early diagnosis and intervention are associated with better outcomes because chronic tears become increasingly difficult to repair.

Treatment

Conservative Management

Conservative treatment remains the first-line approach for most patients without significant tendon tearing.

Treatment Options

Physiotherapy
Activity modification
Nonsteroidal anti-inflammatory drugs (NSAIDs)
Hip abductor strengthening programs

Many patients with tendinosis or mild disease improve with non-operative treatment.

Indications for Surgery

Surgical intervention may be considered when patients have:

Symptomatic tendon tears
Functional disability
Persistent pain despite adequate conservative treatment
Progressive weakness

Surgical Treatment Options

Primary Tendon Repair

Indications

Partial-thickness tears
Repairable full-thickness tears

Outcomes

Primary repair generally provides:

Significant pain relief
Improved hip function
Better gait mechanics
Restoration of abductor strength

Early repairs tend to produce the best results.

Irreparable Tears

Certain tears may not be suitable for direct repair.

Features of Irreparable Tears

Severe tendon retraction
Advanced fatty degeneration
Significant muscle atrophy
Chronic longstanding tears

Reconstruction and Tendon Transfer Procedures

When direct repair is not possible, reconstruction techniques may be considered.

Gluteus Maximus Transfer

The most commonly performed reconstruction procedure.

Advantages

Similar muscle fiber orientation
Effective restoration of abductor function
Reliable pain relief

Other Reconstruction Options

Vastus Lateralis Transfer

May be used in selected cases.

Achilles Tendon Allograft Reconstruction

Reserved for complex situations requiring tissue augmentation.

Special Clinical Situations

Persistent Limp After Total Hip Replacement

Patients who continue to limp after hip arthroplasty should be evaluated for:

Gluteus medius tendon tear
Abductor insufficiency

MRI can be particularly helpful in these cases.

Superior Gluteal Nerve Injury

Abductor dysfunction caused by superior gluteal nerve injury has a poorer prognosis and may not respond well to tendon repair alone.

Prognostic Factors

Factors Associated With Better Outcomes

Early diagnosis
Minimal muscle atrophy
Limited fatty degeneration
Repairable tendon tissue
Early surgical intervention when indicated

Factors Associated With Poor Outcomes

Chronic tears
Severe tendon retraction
Significant fatty infiltration
Advanced muscle atrophy
Superior gluteal nerve dysfunction

Key Takeaways

Gluteus medius tendon tears are a common but frequently overlooked cause of lateral hip pain.
Many cases previously diagnosed as trochanteric bursitis are actually part of the GTPS spectrum.
MRI is the investigation of choice and accurately identifies tendon pathology and muscle quality.
Hip abductor weakness can result in Trendelenburg gait and significant functional limitations.
Early diagnosis and treatment improve outcomes and may prevent progression to irreparable tears.
Primary repair offers excellent results for most repairable tears.
Chronic retracted tears with severe atrophy may require tendon transfer or reconstructive procedures.

Post Views: 6,373