The hip labrum is a ring of fibrocartilage that lines the rim of the acetabulum (hip socket), deepening the socket and providing a seal that maintains joint stability and lubrication. A hip labral tear occurs when this cartilage is partially or completely torn, causing pain, mechanical symptoms, and over time contributing to cartilage damage and early osteoarthritis.
Hip labral tears are rarely an isolated finding — they almost always have an identifiable structural cause that must be addressed alongside the labral repair for treatment to succeed. Femoroacetabular impingement (FAI) is responsible for the majority of labral tears in young adults, while hip dysplasia causes a distinct tearing pattern driven by rim overload rather than impingement. Paralabral cysts develop at labral tear sites and are a reliable secondary marker of the underlying tear on MRI. Untreated labral tears accelerate cartilage damage by disrupting the joint's hydraulic seal, ultimately contributing to hip osteoarthritis — making early diagnosis and repair the key to long-term joint preservation.
Causes
Femoroacetabular impingement.
FAI is the most common cause of hip labral tears in young, active adults. The cam deformity abrades the anterosuperior labrum with each hip flexion cycle, while the pincer deformity crushes the labral tissue between the acetabular rim and femoral neck. Over time, this repetitive mechanical insult produces a tear — typically starting as a delamination injury at the cartilage-labral junction and progressing to a full labral tear. The vast majority of labral tears identified in symptomatic young adults are associated with an underlying FAI morphology that must be corrected at the time of labral repair to prevent recurrence.
Hip dysplasia and other causes.
In hip dysplasia, the labrum bears disproportionate load because it is compensating for inadequate bony coverage of the femoral head — essentially functioning as an extension of the socket rim. This chronic overload produces a characteristic anterosuperior labral tear that is typically larger and more complex than FAI-related tears. Traumatic causes include hip dislocations, dashboard injuries, and twisting or pivoting mechanisms in sports — hockey, soccer, golf, and ballet have particularly high labral tear rates. Age-related degeneration produces complex, frayed tears in older adults, often in the setting of early osteoarthritis.
Symptoms
The classic symptom is deep anterior groin pain that worsens with prolonged sitting, pivoting, squatting, and athletic activity — particularly activities that require repetitive hip flexion. Patients frequently use the "C sign," cupping the hand around the lateral hip to indicate a deep, diffuse pain source that is difficult to pinpoint, which reflects the intra-articular origin of the pain. Clicking, catching, or locking sensations with hip motion are common mechanical symptoms, particularly when the torn labral tissue or an associated paralabral cyst is caught between the joint surfaces. Pain may also radiate to the lateral hip or buttock, and a sense of instability, stiffness, and reduced range of motion — particularly internal rotation and flexion — is frequently reported. Many patients are misdiagnosed with a hip flexor or groin strain and receive months of ineffective physical therapy before the labral tear is identified, underscoring the importance of MRI arthrogram in any young adult with persistent unexplained hip pain.
Diagnosis
A physical exam by a doctor includes the anterior impingement test (FADIR — Flexion, ADduction, Internal Rotation), the FABER test (Flexion, ABduction, External Rotation), and the log roll test, which assess the various components of labral pathology and underlying structural abnormality. A diagnostic intra-articular injection of local anesthetic that abolishes the pain strongly supports an intra-articular source. X-rays identify underlying structural abnormalities — the alpha angle for cam morphology and the lateral center-edge angle for acetabular coverage — but do not visualize the labrum itself. An MRI arthrogram — MRI performed after gadolinium contrast is injected directly into the hip joint — is the gold standard for detecting hip labral tears, offering superior sensitivity compared to standard MRI by filling the joint space with contrast that outlines the labral tissue and infiltrates any tears. MRI arthrogram characterizes tear location (anterior, posterior, superior), pattern (radial, flap, longitudinal, degenerative), depth, and extent, and simultaneously evaluates for associated cartilage defects, paralabral cysts, and the underlying bony morphology driving the tear — all essential information for surgical planning.
Tear classification
Doctors classify hip labral tears by location and pattern, which guides the surgical approach and repair technique.
- Anterior tear: Involves the front portion of the labrum — the most common location, almost universally associated with FAI cam or pincer morphology. The anterosuperior labrum at the 12 o'clock position is the most frequently injured zone.
- Posterior tear: Involves the back portion of the labrum. More commonly seen after traumatic posterior hip dislocation or in association with hip dysplasia with posterior instability.
- Radial (flap) tear: Extends outward from the articular surface into the substance of the labrum, creating an unstable flap of tissue that can be caught between joint surfaces during motion.
- Longitudinal tear: Runs along the length of the labrum parallel to the acetabular rim, separating the labrum from its bony attachment — often the result of chronic shear loading in dysplastic hips.
- Degenerative tear: Complex, frayed tearing pattern without a clean tear margin. Typically seen in older patients or in the setting of early osteoarthritis — less amenable to primary repair.
Treatments
Treatment depends on the size and location of the tear, severity of symptoms, presence of underlying structural abnormalities, patient age, and activity level. Critically, addressing the labral tear without correcting its underlying cause — FAI, dysplasia, or instability — predictably leads to re-tearing and treatment failure.
Initial management includes activity modification, anti-inflammatory medications, and avoidance of aggravating positions such as deep hip flexion and prolonged sitting in low chairs.
Minor tears without mechanical symptoms: Physical therapy focusing on core strengthening, hip abductor and rotator conditioning, and movement pattern correction can provide meaningful symptom improvement in patients with small tears and minimal structural pathology. Intra-articular corticosteroid injections provide significant pain relief and serve as both a therapeutic and diagnostic tool — improvement confirms the hip joint as the primary pain generator and helps distinguish labral pain from extra-articular sources such as iliopsoas tendinopathy or trochanteric bursitis.
Significant tears in young and active patients
Surgery is advised for young or active patients with persistent symptoms despite appropriate conservative care, particularly when an underlying structural cause such as FAI or dysplasia is identified. Arthroscopic labral repair uses suture anchors to anatomically reattach the torn labrum to the acetabular rim, restoring the joint seal, joint fluid pressurization, and the normal load distribution function of the intact labrum. Primary repair is strongly preferred over debridement (simple resection of the torn portion) because preserving labral tissue produces significantly better long-term outcomes — debridement accelerates cartilage loss by eliminating the hydraulic seal. The underlying FAI bone deformity is corrected simultaneously. After surgery, a protected weight-bearing period and structured physical therapy program over 4–6 months are essential for a full recovery.
Irreparable labral tears
When the labrum is too degenerated, deficient, or previously resected for primary repair, labral reconstruction using an autograft or allograft tendon graft — fashioned to recreate the labral ring and sutured to the acetabular rim — can restore labral seal function. This technically demanding procedure is most commonly performed in revision cases or in young patients with extensive degenerative tearing where preservation of the native joint is a priority.
Labral tears with advanced arthritis
When significant osteoarthritis accompanies the labral tear — with advanced cartilage loss and joint space narrowing — arthroscopic repair is unlikely to provide durable benefit and total hip arthroplasty becomes the recommended treatment. Identifying and surgically addressing labral pathology and its structural cause before arthritis develops is the most effective strategy for preserving the native hip joint long-term.
Get an MRI to Confirm Your Diagnosis
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