Hip Pathologies

Hip Pathologies

PT 607



Instructor: Christopher R. Clock PT, DPT, OCSSpring 2025MGH Institute of Health Professions

Types of Soft Tissue Lesions

Categories of Lesions:

  • Strain: Overuse or overstretching of soft tissues, often resulting in pain and muscle weakness. Commonly occurs in the hip flexors, hamstrings, adductor muscles, and gluteals due to repetitive activities.

  • Sprain: Involves severe stress or tear mainly affecting inert tissues, primarily ligaments. While less common in the hip due to robust ligaments and joint capsule, sprains can lead to significant instability and pain.

  • Dislocation: Characterized by complete displacement of joint articulation, resulting in a loss of normal function and severe pain. Immediate medical attention is required to restore the joint position and prevent further complications.

  • Subluxation: A partial dislocation that allows for some normal articulation of the joint, potentially leading to instability and recurrent dislocations if not treated.

  • Rupture/Tear: Involves complete or partial disruptions of muscle or tendon fibers, which may require surgical intervention based on severity.

  • Tendinopathy: Encompasses a range of conditions affecting tendons, such as tenosynovitis (inflammation of the tendon sheath), tendinitis (inflammation of the tendon), tenovaginitis (inflammation of the tendon sheath plus thickening), and tendinosis (degeneration of the tendon due to chronic strain).

  • Bursitis: Inflammation of the bursae, small fluid-filled sacs that reduce friction between moving parts. Common in the hip region, particularly affecting the greater trochanteric, iliopectineal, and ischial bursae, it can cause localized tenderness and limit mobility.

  • Synovitis: Involves inflammation of the synovial membrane, which can lead to swelling and pain in the joint.

  • Hemarthrosis: The presence of blood within a joint, often due to trauma, leading to joint swelling and pain.

  • Contusion: Bruising from direct trauma, leading to localized pain and swelling.

  • Ganglion: A fluid-filled cyst typically found near tendons, which can cause discomfort and limit range of motion, although they are rare in the hip region.

Strain vs Sprain

  • Strain:

    • Caused primarily by repetitive overuse or overstretching of muscles.

    • Involves contractile tissues, especially musculature, leading to pain, swelling, and reduced range of motion.

    • Common areas affected include the hip flexor, hamstring, adductors, and gluteal muscles.

  • Sprain:

    • More severe condition that results from significant stress or tearing of ligaments.

    • Involves inert tissues, specifically ligaments that connect bones at joints.

    • Less frequently seen in the hip, due to the strong and stable ligamentous support from the surrounding capsule, but can result in significant functional impairment and pain if they occur.

Subluxation vs Dislocation

  • Subluxation:

    • An incomplete dislocation that allows for some normal articulation and joint function.

    • Often associated with repetitive stress or trauma, it can lead to chronic instability if not addressed.

  • Dislocation:

    • Complete displacement of the joint surfaces, resulting in loss of function, severe pain, and potential nerve or vascular injury if not properly treated.

    • Requires immediate medical intervention to restore normal joint function and stability. Both conditions can cause significant tissue damage and complications, particularly in the context of growth plate damage in young athletes.

Muscle Tear or Rupture

  • Partial Tear:

    • Occurs when muscle fibers are partially ruptured; neuronal components remain intact, leading to significant pain, swelling, and functional limitations.

  • Full Thickness Tear/Rupture:

    • A complete disruption of the muscle or tendon, leading to immediate severe pain, which may subside as nerves get severed and further complications arise.

    • These injuries can affect any muscle of the hip, often requiring rehabilitation or surgical intervention for optimal recovery.

Tendinopathies

  • Tendonitis:

    • Characterized by inflammation of a tendon, often resulting in localized pain and tenderness.

  • Tendinosis:

    • Refers to degeneration of the tendon due to chronic repetitive use and inflammation, often resulting in persistent pain and functional limitations.

  • Tenosynovitis:

    • Involves inflammation of the synovial sheath surrounding the tendon, leading to pain and swelling.

  • Tenovaginitis:

    • The condition characterized by inflammation alongside thickening of the synovial sheath, which can further limit tendon motion.

  • Commonly Affected Regions: Typically include hip flexors, hamstrings, and gluteal muscles, with treatment often focusing on activity modification, physical therapy, and anti-inflammatory medications.

Bursitis

  • Characteristics:

    • Defined by fluid-filled synovial layers that serve as a protective barrier, reducing friction between tissues.

    • Can present acutely, often mimicking symptoms of tendonitis, making differential diagnosis important.

  • Commonly Affected Areas in the Hip:

    • Greater trochanteric bursa, ischial bursa, and iliopectineal bursa are the most frequently involved, leading to localized pain when sitting or moving.

Adhesions and Contracture

  • Adhesion:

    • Refers to the loss of normal elasticity in soft tissues due to injury and subsequent scarring, which can limit motion and cause pain.

  • Contracture:

    • Characterized by adaptive shortening of tissue, particularly in structures like joint capsules or fascia, often due to immobilization or lack of use.

    • Common hip regions affected include hamstrings, adductors, and hip flexors.

Synovitis, Hemarthrosis, Contusion, Ganglion

  • Synovitis:

    • Inflammation of the joint capsule leading to pain, swelling, and decreased range of motion. Early diagnosis is critical for effective treatment.

  • Hemarthrosis:

    • Accumulation of blood in the joint space, often due to trauma, which presents with swelling and severe pain, necessitating urgent evaluation.

  • Contusion:

    • Results from capillary rupture due to direct trauma, leading to localized pain, swelling, and sometimes bruising.

  • Ganglion:

    • A fluid-filled cyst often located along tendons, typically presenting with a palpable mass; they can occasionally compress nearby nerves. Rare in the hip area, but possible.

Other Hip Pathologies: Pediatric Conditions

  • Legg Calve Perthes Disease:

    • Avascular necrosis of the femoral head, most common in children aged 4-10, leading to hip pain and limping. Early diagnosis and intervention are crucial for preventing long-term complications.

  • Slipped Capital Femoral Epiphysis:

    • Characterized by displacement of the femoral head due to epiphyseal plate fracture, prevalent in adolescents aged 10-16. Often linked with obesity or trauma, requiring surgical intervention.

  • Fracture Types:

    • Stress fractures can develop from overuse or traumatic events affecting the femoral shaft/neck; may require imaging and careful management.

Other Hip Pathologies (Nervous System Related)

  • Piriformis Syndrome:

    • Muscle tightness resulting in sciatic nerve irritation, may cause buttock and leg pain; less common than nerve compression syndromes.

  • Meralgia Parasthetica:

    • Compression of the lateral femoral cutaneous nerve, leading to pain and paresthesia in the outer thigh, often related to tight clothing or obesity.

  • Sciatica:

    • Caused by irritation of the sciatic nerve, leading to symptoms radiating down the posterior thigh and into the leg; often linked to disc herniation or spinal stenosis.

Other MSK Pathologies

  • Sports Hernia:

    • A painful condition affecting the adductor muscles or related structures in athletes, often requiring surgical intervention.

  • Snapping Hip:

    • A condition where a tendon slides over a bone, often accompanied by an audible snap or click; commonly caused by tight musculature.

  • Avulsion Injury:

    • Occurs when a muscle or ligament pulls off a small piece of bone; typically results from high-force injuries and may require surgical repair.

  • Apophysitis:

    • A stress injury at the growth plate during growth spurts due to repetitive activities, commonly affecting young athletes.

Femoro-acetabular Impingement Diagnosis

  • Pathology: Arises from contact between the femoral head-neck junction and the acetabular rim, which can lead to labral tears.

  • Cam Lesion:

    • Refers to an irregular femoral head that prevents smooth joint rotation, often associated with hip pain and decreased range of motion.

  • Pincer Lesion:

    • Results from bone overgrowth on the acetabular rim, which can crush the labrum and lead to labral pathology.

Femoro-acetabular Impingement Risk Factors

  • Factors contributing to impingement include:

    • Repetitive hip flexion activities seen in athletes.

    • Anatomical abnormalities of the femoral head or acetabulum.

    • Traumatic events, inflammatory arthritis, or congenital hip conditions.

    • Most commonly affects individuals aged 20-40 years old.

Femoro-acetabular Impingement History

  • Symptoms often have an insidious onset with gradual progression; may initially resemble hip flexor strains, complicating diagnosis.

  • Over time, symptoms may progress to osteoarthritis-like pain, particularly with prolonged activity.

  • Common primary symptom experienced is movement-related groin pain, which may limit daily functions.

Femoro-acetabular Impingement Mechanism of Injury

  • Typical injuries stem from high-intensity sports that require dynamic movement;

  • Common observations include:

    • Severe pain at the groin during activities.

    • Catching sensations or locking in the hip joint.

    • Potential muscle weakness due to pain inhibition.

Femoro-acetabular Impingement Active Range of Motion

  • Persistent pain and mechanical symptoms may lead to limited mobility in internal rotation, external rotation, and hip flexion.

  • Decreased active motion can often be assessed through special physical tests and may indicate the presence of impingement.

Special Tests for Femoro-acetabular Impingement

  • Tests to assist in diagnosing FAI include:

    • FADDIR (Flexion, Adduction, Internal Rotation).

    • Postero-inferior impingement test.

    • FABER (Flexion, Abduction, External Rotation).

    • Antero-posterior Impingement Test.

    • Scour test.

    • Posterior labral test.

Gait and Function in Femoro-acetabular Impingement

  • Evaluation should look for signs of weakness, instability, and abnormal gait patterns associated with hip dysfunction.

  • Common gait issues may include a Trendelenburg gait, decreased stride length, and pain with transitions such as sitting to standing, impacting mobility and quality of life.

Femoro-acetabular Impingement Imaging

  • Imaging Techniques:

    • X-rays are typically employed to identify cam and pincer lesions, providing initial insight into bony structures.

    • MRI with contrast is the preferred method for definitive diagnosis of labral injuries and soft tissue evaluation, offering greater detail than bone scans.

Hip Tendinopathy History

  • Develops primarily from overuse, leading to gradual onset of pain symptoms which may worsen with activity.

  • Risk factors for hip tendinopathy include increasing age, occupational demands involving repetitive motions, and participation in high-impact sports.

Hip Tendinopathy Mechanism of Injury

  • Linked to overuse and mechanical overload of tendons in the hip region.

  • Observational signs may include tenderness at specific tendon sites, swelling, and potentially crepitus during movement.

Hip Tendinopathy Special Tests

  • Special tests used to assess hip tendinopathy include:

    • Ely test for hip flexor length.

    • Thomas test for hip flexor tightness.

    • Straight leg raise test and 90/90 test for hamstring evaluation.

    • FABER test for assessment of gluteal tendons.

    • Piriformis Length test to examine the piriformis muscle’s condition.

Hip Tendinopathy Gait and Function

  • Typically presents with a shortened walking gait and decreased walking speed, impacting endurance and daily activities.

  • Altered pelvic mechanics and kinematics can be noted during gait analysis, reflecting compensatory patterns.

Hip Stress Fracture History/Risk Factors

  • Comprehensive history review is necessary, focusing on past injuries, relative energy deficiency, and increased workload as major contributing factors.

  • Individuals who are inactive or overweight present additional risks for developing hip stress fractures.

Hip Stress Fracture Mechanism of Injury

  • Often results from repetitive loading or direct trauma to the hip region, particularly in individuals engaged in high-impact activities.

  • Signs and symptoms may include an inability to bear weight, pronounced local pain, and external rotation compensation during weight-bearing activities.

Hip Stress Fracture Active Range of Motion

  • Motion limitations vary depending on the severity of the fracture; patients may present with full range of motion or significant restrictions, impacting rehabilitation priorities.

  • Pain is often exacerbated at the end range of passive motion, highlighting the need for tailored physical therapy protocols.

Hip Stress Fracture Imaging

  • Initial assessments are typically performed using plain radiographs to rule out fractures.

  • MRI is preferred for detailed evaluation, particularly over routine bone scans, allowing for clear visualization of stress fractures.

Planning Examination

  • Consider comprehensive tests and imaging procedures to accurately rule in or out various hypotheses regarding hip pathologies, facilitating effective treatment and management strategies.