Gluteal Tendon Tears (Hip Abductor Tears)

Gluteal tendon tears are tears of the gluteus medius and/or minimus tendons at their insertion on the greater trochanter. They are increasingly recognised as a discrete cause of chronic lateral hip pain and abductor weakness, distinct from simple bursitis. Because the gluteus medius and minimus stabilise the pelvis during single-leg stance in the same way the rotator cuff stabilises the glenohumeral joint, abductor tendon tears are widely described as the "rotator cuff of the hip" and follow a similar natural history of tendinopathy progressing to partial then full-thickness tearing with retraction and fatty muscle change. [1,2]

Functional anatomy

The hip abductor mechanism is formed by the gluteus medius and gluteus minimus, with the iliotibial band and tensor fascia lata contributing to lateral pelvic stability.

• Gluteus medius inserts on two facets of the greater trochanter: the lateral facet (the main, broad insertion) and the superoposterior facet. It is the principal hip abductor and the key pelvic stabiliser in single-leg stance.
• Gluteus minimus inserts more anteriorly on the anterior facet of the greater trochanter and on the hip capsule, acting as an abductor and a fine-tuner of femoral head position.
• The tendons lie deep to the iliotibial band; the overlying ITB applies a compressive load against the trochanter, particularly in hip adduction.
• The superior gluteal nerve supplies both muscles and the tensor fascia lata; it runs between gluteus medius and minimus and is at risk during lateral approaches and during surgical mobilisation of the tendons.

Mechanism and pathophysiology

Most tears are degenerative. Repetitive tensile load during abduction combines with compressive load from the ITB against the trochanter, producing a zone of tendinopathy near the insertion - directly analogous to the "critical zone" of the supraspinatus. Over time this degenerate tendon undergoes:

1. Tendinopathy - intratendinous degeneration without a discrete tear.
2. Partial-thickness tear - undersurface (deep) or interstitial fibre failure with the footprint partly intact.
3. Full-thickness tear - complete detachment from the facet, with progressive retraction.
4. Muscle change - chronic tears develop fatty infiltration and atrophy of the muscle belly, which is largely irreversible and is the strongest predictor of poor repair.

Tensor fascia lata hypertrophy is a recognised compensatory finding: as the gluteus medius fails, the TFL enlarges to maintain abduction, and this hypertrophy on imaging is a useful indirect clue to a significant abductor tear.

The post-arthroplasty abductor

After total hip arthroplasty - especially via a lateral (transgluteal) approach - the abductors can fail by iatrogenic detachment, suture pull-out, attritional wear, or denervation from superior gluteal nerve injury. The result is abductor deficiency, a Trendelenburg gait, and in severe cases recurrent dislocation, because the abductors also contribute to dynamic hip stability. [4]

There is no single universally adopted classification for gluteal tendon tears; the most useful framework for the exam is to describe tears by tear thickness, retraction, and muscle fatty infiltration, because these are what guide treatment. Several descriptive schemes exist.

The topic repeatedly says fatty infiltration is graded "in a Goutallier-type fashion," and it is the single variable that most changes management - yet the scale itself is worth stating explicitly, because examiners ask candidates to name and apply it to the abductor muscle.

The Goutallier classification was originally described for the rotator-cuff muscles on CT and later adapted to MRI (the Fuchs modification), and the same five grades are applied to the gluteus medius and minimus:

• Grade 0 - normal muscle, no fat.
• Grade 1 - some fatty streaks within the muscle.
• Grade 2 - fatty infiltration present, but muscle bulk still exceeds fat.
• Grade 3 - fat and muscle in roughly equal amounts.
• Grade 4 - fat exceeds muscle.

Why it decides the operation: low-grade change (grades 0 to 2) behaves like a repairable tendon with viable muscle, so suture-anchor repair to the footprint is reasonable. High-grade change (grades 3 to 4) signals a muscle that has been largely replaced by fat - the change is essentially irreversible, the tendon is functionally irreparable, and direct repair is unreliable; this is where graft augmentation or gluteus maximus transfer is preferred. Fatty infiltration is best judged on T1-weighted images, where fat is bright, and it should always be paired with the structural description (thickness, retraction) to reach a decision. The scale is ordinal and shows only moderate inter-observer agreement, so it guides rather than dictates - a point worth conceding in a viva.

History

• Chronic lateral hip pain over the greater trochanter, often present for months to years, worse with side-lying, stairs and prolonged single-leg loading.
• Abductor weakness - difficulty climbing stairs, getting out of a car, or a sense of the leg "giving way" laterally.
• A limp is common; patients may describe a waddling or lurching gait.
• In post-arthroplasty patients, a persistent limp, weakness or recurrent dislocation after hip replacement should raise suspicion of an abductor tear.

Examination

• Gait: Trendelenburg gait (pelvis drops on the contralateral swing side) or a compensatory abductor lurch (trunk shifts over the affected hip).
• Trendelenburg test: single-leg stance on the affected side - the contralateral hemipelvis drops, indicating abductor failure.
• Resisted abduction: weak and often painful; weakness (not just pain) suggests a structural tear rather than pure tendinopathy.
• Palpation: point tenderness over the greater trochanter.
• Hip lag sign / abduction lag: inability to hold the leg in passively positioned abduction is described as a clinical predictor of significant abductor damage.
• Hip range of motion: typically preserved (helps distinguish from hip osteoarthritis, which gives groin pain and restricted internal rotation).

Management is staged: structured rehabilitation first for most partial tears, with surgery reserved for refractory partial tears and for full-thickness tears, and salvage transfer or reconstruction for chronic irreparable disease.

The topic names gluteus maximus transfer as the workhorse salvage for the chronic, retracted, fatty, irreparable abductor - but an examiner will ask you to actually describe it and to counsel the patient, so the technique is worth developing.

Principle

When the gluteus medius and minimus are functionally lost (high-grade fatty infiltration and retraction) but the gluteus maximus is intact and innervated by the inferior gluteal nerve, part of gluteus maximus is transferred to reconstruct an active abductor pull across the greater trochanter. It is a dynamic, muscle-based reconstruction rather than a repair of the native tendon.

Technique in outline

• Through a lateral approach, the diseased abductor tendon is debrided and the greater trochanter is prepared to a bleeding bony bed.
• The anterior portion (flap) of gluteus maximus is mobilised on its neurovascular pedicle, preserving the inferior gluteal nerve supply, and advanced anterolaterally over the trochanter. In the classic Whiteside description a gluteus maximus flap alone is used; combined constructs add the posterior part of the tensor fascia lata, and the two flaps are wrapped to recreate an abductor sleeve (the technique described for severe deficiency in revision arthroplasty).
• The flap is secured to the trochanter or to the vastus lateralis / residual abductor stump and tensioned with the hip held in abduction, so that resting tone helps hold the pelvis level.
• Rehabilitation is protected and prolonged, mirroring an abductor repair: restricted weight-bearing with the limb supported in slight abduction and limited active abduction, then graded strengthening, because early loading pulls the transfer out.

What to warn the patient

Transfer reliably improves pain and stability, but it does not restore normal power: residual abductor weakness, a persistent Trendelenburg gait or lurch, and continued reliance on a walking aid are common, and the reconstruction can still fail. This honest counselling - a more comfortable, more stable hip, but not a normal gait - is exactly what examiners want to hear, and it matches the outcomes reported for salvage transfer.

Prognosis: appropriately selected partial and full-thickness tears with reasonable muscle quality do well with repair, achieving meaningful pain relief and strength gains by open or endoscopic technique. Chronic, retracted, fatty, irreparable tears do less well and rely on salvage transfer or reconstruction, where pain relief is more reliable than full restoration of strength.

Global Epidemiology

• Peritrochanteric tendon pathology, including partial and full-thickness gluteus medius/minimus tears, is found in roughly one in five hips on MRI in unselected imaging populations, and is detected more reliably on 3.0-Tesla scanners. [3]
• A strong female predominance and a peak in the sixth and seventh decades are consistent across surgical series worldwide; most tears are degenerative rather than acute.
• Abductor deficiency is a recognised cause of pain, limp and instability after total hip arthroplasty, particularly following lateral (transgluteal) approaches. [4]

Society Guidance Compared

There is broad international agreement that MRI guides surgical decision-making, that repairable tears are treated by open or endoscopic suture-anchor repair with comparable outcomes, and that chronic retracted irreparable tears require salvage transfer or reconstruction. No body endorses a single proven fixation construct.

Registry & Outcome Notes

There is no dedicated gluteal tendon tear registry. Surgical-outcome evidence comes from systematic reviews and case series: open and endoscopic abductor repair give comparable patient-reported outcomes with more complications reported after open surgery [6], and salvage reconstruction with dermal allograft shows promising early results in massive irreparable tears [7]. In the arthroplasty setting, abductor deficiency is an important but under-captured cause of an unhappy hip in registry follow-up, often presenting as persistent limp or instability rather than a discrete revision diagnosis. [4]

High- vs Limited-Resource Practice Variation

• Well-resourced settings: 3.0-T MRI, ultrasound-guided injection, endoscopic and open repair, dermal allograft reconstruction, and tendon-transfer salvage are all available.
• Limited-resource settings: diagnosis leans on clinical assessment (Trendelenburg gait, weak resisted abduction, abduction lag sign) and ultrasound; management emphasises structured abductor loading rehabilitation, with open repair where surgery is available and endoscopic equipment or graft is not. The global priority remains accurate identification of a structural tear so that rehabilitation and surgery are directed appropriately.

Further uncertainty surrounds the prevalence of asymptomatic abductor tears, the prognostic value of MRI grading for predicting repair success, and the place of biologics in established full-thickness tears.

Gluteal tendon tears are structural tears of the gluteus medius and minimus tendons at their insertion on the greater trochanter - often called the rotator cuff of the hip because they mirror supraspinatus pathology. They typically affect women aged 50 to 70 and present as chronic lateral hip pain with abductor weakness, a Trendelenburg gait and difficulty single-leg standing. They are the structural, surgical end of a spectrum whose milder forms (tendinopathy and bursitis) are covered under greater trochanteric pain syndrome. MRI is the reference standard, characterising tear thickness, retraction and - most importantly - muscle fatty infiltration, which predicts reparability. Partial tears are managed with loading rehabilitation and repaired (open or endoscopic) if they fail; full-thickness tears are repaired with suture anchors; massive irreparable tears with high-grade fatty change are salvaged with graft augmentation or gluteus maximus tendon transfer. A distinct and high-yield setting is abductor deficiency after total hip arthroplasty, where attritional or iatrogenic tears cause limp and instability and may need repair, transfer or reconstruction.

1. Harrasser N, Banke I, Gollwitzer H, et al. Gluteal insufficiency: pathogenesis, diagnosis and therapy. Z Orthop Unfall. 2016;154(2):140-147. doi:10.1055/s-0041-110812
2. Morgan A, Moore M, Derry K, et al. Surgical treatment and outcomes for gluteal tendon tears. Curr Rev Musculoskelet Med. 2024;17(6):157-170. doi:10.1007/s12178-024-09896-w
3. Oehler N, Ruby JK, Strahl A, et al. Hip abductor tendon pathology visualized by 1.5 versus 3.0 Tesla MRIs. Arch Orthop Trauma Surg. 2020;140(2):145-153. doi:10.1007/s00402-019-03228-1
4. Elbuluk AM, Coxe FR, Schimizzi GV, et al. Abductor deficiency-induced recurrent instability after total hip arthroplasty. JBJS Rev. 2020;8(1):e0164. doi:10.2106/JBJS.RVW.18.00164
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6. Chandrasekaran S, Lodhia P, Gui C, et al. Outcomes of open versus endoscopic repair of abductor muscle tears of the hip: a systematic review. Arthroscopy. 2015;31(10):2057-2067. doi:10.1016/j.arthro.2015.03.042
7. Browning RB, Clapp IM, Alter TD, et al. Superior gluteal reconstruction results in promising outcomes for massive abductor tendon tears. Arthrosc Sports Med Rehabil. 2021;3(5):e1321-e1327. doi:10.1016/j.asmr.2021.05.013
8. Burns DM, Bornes TD, Al Khalifa A, et al. Surgical technique: abductor reconstruction with gluteus maximus and tensor fascia lata in revision total hip arthroplasty. J Arthroplasty. 2022;37(7S):S628-S635. doi:10.1016/j.arth.2022.03.006
9. Lindner D, Shohat N, Botser I, et al. Clinical presentation and imaging results of patients with symptomatic gluteus medius tears. J Hip Preserv Surg. 2015;2(4):310-315. doi:10.1093/jhps/hnv035
10. Caviglia H, Cambiaggi G, Vattani N, et al. Lesion of the hip abductor mechanism. SICOT J. 2016;2:29. doi:10.1051/sicotj/2016020