PUSH Fitness & Rehabiliation
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Evaluation of the Patient with Hip Pain

Hip pain is a well-known health issue which can be caused by a wide array of problems, however, the site of the patient’s hip pain can provide valuable information regarding the underlying cause of this common health issue. Pain on the inside of the hip or groin can be due to problems within the hip joint itself while pain on the outside of the hip, upper thigh and outer buttocks may be due to problems with the ligaments, tendons and muscles, among other soft tissues, surrounding the hip joint. Furthermore, hip pain can be due to other injuries and conditions, including back pain.

Abstract

Hip pain is a common and disabling condition that affects patients of all ages. The differential diagnosis of hip pain is broad, presenting a diagnostic challenge. Patients often express that their hip pain is localized to one of three anatomic regions: the anterior hip and groin, the posterior hip and buttock, or the lateral hip. Anterior hip and groin pain is commonly associated with intra-articular pathology, such as osteoarthritis and hip labral tears. Posterior hip pain is associated with piriformis syndrome, sacroiliac joint dysfunction, lumbar radiculopathy, and less commonly ischiofemoral impingement and vascular claudication. Lateral hip pain occurs with greater trochanteric pain syndrome. Clinical examination tests, although helpful, are not highly sensitive or specific for most diagnoses; however, a rational approach to the hip examination can be used. Radiography should be performed if acute fracture, dislocations, or stress fractures are suspected. Initial plain radiography of the hip should include an anteroposterior view of the pelvis and frog-leg lateral view of the symptomatic hip. Magnetic resonance imaging should be performed if the history and plain radiograph results are not diagnostic. Magnetic resonance imaging is valuable for the detection of occult traumatic fractures, stress fractures, and osteonecrosis of the femoral head. Magnetic resonance arthrography is the diagnostic test of choice for labral tears.

Introduction

Hip pain is a common presentation in primary care and can affect patients of all ages. In one study, 14.3% of adults 60 years and older reported significant hip pain on most days over the previous six weeks.1 Hip pain often presents a diagnostic and therapeutic challenge. The differential diagnosis of hip pain (eTable A) is broad, including both intra-articular and extra-articular pathology, and varies by age. A history and physical examination are essential to accurately diagnose the cause of hip pain.

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Anatomy

The hip joint is a ball-and-socket synovial joint designed to allow multiaxial motion while transferring loads between the upper and lower body. The acetabular rim is lined by fibrocartilage (labrum), which adds depth and stability to the femoroacetabular joint. The articular surfaces are covered by hyaline cartilage that dissipates shear and compressive forces during load bearing and hip motion. The hip’s major innervating nerves originate in the lumbosacral region, which can make it difficult to distinguish between primary hip pain and radicular lumbar pain.

The hip joint’s wide range of motion is second only to that of the glenohumeral joint and is enabled by the large number of muscle groups that surround the hip. The flexor muscles include the iliopsoas, rectus femoris, pectineus, and sartorius muscles. The gluteus maximus and hamstring muscle groups allow for hip extension. Smaller muscles, such as gluteus medius and minimus, piriformis, obturator externus and internus, and quadratus femoris muscles, insert around the greater trochanter, allowing for abduction, adduction, and internal and external rotation.

In persons who are skeletally immature, there are several growth centers of the pelvis and femur where injuries can occur. Potential sites of apophyseal injury in the hip region include the ischium, anterior superior iliac spine, anterior inferior iliac spine, iliac crest, lesser trochanter, and greater trochanter. The apophysis of the superior iliac spine matures last and is susceptible to injury up to 25 years of age.2

Dr Jimenez White Coat

The hip joint is one of the larger joints found in the human body and it serves in locomotion as the thigh moves forward and backward. The hip joint also rotates when sitting and with changes of direction while walking. A variety of complex structures surround the hip joint. When an injury or condition affects these, it can ultimately lead to hip pain.

Dr. Alex Jimenez D.C., C.C.S.T.

Evaluation of Hip Pain

History

Age alone can narrow the differential diagnosis of hip pain. In prepubescent and adolescent patients, congenital malformations of the femoroacetabular joint, avulsion fractures, and apophyseal or epiphyseal injuries should be considered. In those who are skeletally mature, hip pain is often a result of musculotendinous strain, ligamentous sprain, contusion, or bursitis. In older adults, degenerative osteoarthritis and fractures should be considered first.

Patients with hip pain should be asked about antecedent trauma or inciting activity, factors that increase or decrease the pain, mechanism of injury, and time of onset. Questions related to hip function, such as the ease of getting in and out of a car, putting on shoes, running, walking, and going up and down stairs, can be helpful.3 Location of the pain is informative because hip pain often localizes to one of three basic anatomic regions: the anterior hip and groin, posterior hip and buttock, and lateral hip (eFigure A).

Physical Examination

The hip examination should evaluate the hip, back, abdomen, and vascular and neurologic systems. It should start with a gait analysis and stance assessment (Figure 1), followed by evaluation of the patient in seated, supine, lateral, and prone positions (Figures 2 through 6, and eFigure B). Physical examination tests for the evaluation of hip pain are summarized in Table 1.

Imaging

Radiography. Radiography of the hip should be performed if there is any suspicion of acute fracture, dislocation, or stress fracture. Initial plain radiography of the hip should include an anteroposterior view of the pelvis and a frog-leg lateral view of the symptomatic hip.4

Magnetic Resonance Imaging and Arthrography. Conventional magnetic resonance imaging (MRI) of the hip can detect many soft tissue abnormalities, and is the preferred imaging modality if plain radiography does not identify specific pathology in a patient with persistent pain.5 Conventional MRI has a sensitivity of 30% and an accuracy of 36% for diagnosing hip labral tears, whereas magnetic resonance arthrography provides added sensitivity of 90% and accuracy of 91% for the detection of labral tears.6,7

Ultrasonography. Ultrasonography is a useful technique for evaluating individual tendons, confirming suspected bursitis, and identifying joint effusions and functional causes of hip pain.8 Ultrasonography is especially useful for safely and accurately performing imaging-guided injections and aspirations around the hip.9 It is ideal for an experienced ultrasonographer to perform the diagnostic study; however, emerging evidence suggests that less experienced clinicians with appropriate training can make diagnoses with reliability similar to that of an experienced musculoskeletal ultrasonographer.10,11

Dr Jimenez White Coat

These are numerous causes for hip pain. Although some hip pain may only be temporary, other forms of hip pain can become chronic if left untreated for an extended period of time. Several common causes of hip pain include, arthritis, fracture, sprain, avascular necrosis, Gaucher’s disease, sciatica, muscle strain, iliotibial band syndrome or IT band syndrome and hematoma, among others described below.

Dr. Alex Jimenez D.C., C.C.S.T.

Differential Diagnosis of Anterior Hip Pain

Anterior hip or groin pain suggests involvement of the hip joint itself. Patients often localize pain by cupping the anterolateral hip with the thumb and forefinger in the shape of a “C.” This is known as the C sign (Figure 1A).

Osteoarthritis

Osteoarthritis is the most likely diagnosis in older adults with limited motion and gradual onset of symptoms. Patients have a constant, deep, aching pain and stiffness that are worse with prolonged standing and weight bearing. Examination reveals decreased range of motion, and extremes of hip motion often cause pain. Plain radiographs demonstrate the presence of asymmetrical joint-space narrowing, osteophytosis, and subchondral sclerosis and cyst formation.12

Femoroacetabular Impingement

Patients with femoroacetabular impingement are often young and physically active. They describe insidious onset of pain that is worse with sitting, rising from a seat, getting in or out of a car, or leaning forward.13 The pain is located primarily in the groin with occasional radiation to the lateral hip and anterior thigh.14 The FABER test (flexion, abduction, external rotation; Figure 3) has a sensitivity of 96% to 99%. The FADIR test (flexion, adduction, internal rotation; Figure 4), log roll test (Figure 5), and straight leg raise against resistance test (Figure 6) are also effective, with sensitivities of 88%, 56%, and 30%, respectively.14,15 In addition to the anteroposterior and lateral radiograph views, a Dunn view should be obtained to help detect subtle lesions.16

Hip Labral Tear

Hip labral tears cause dull or sharp groin pain, and one-half of patients with a labral tear have pain that radiates to the lateral hip, anterior thigh, and buttock. The pain usually has an insidious onset, but occasionally begins acutely after a traumatic event. About one-half of patients with this injury also have mechanical symptoms, such as catching or painful clicking with activity.17 The FADIR and FABER tests are effective for detecting intra-articular pathology (the sensitivity is 96% to 75% for the FADIR test and is 88% for the FABER test), although neither test has high specificity.14,15,18 Magnetic resonance arthrography is considered the diagnostic test of choice for labral tears.6,19 However, if a labral tear is not suspected, other less invasive imaging modalities, such as plain radiography and conventional MRI, should be used first to rule out other causes of hip and groin pain.

Iliopsoas Bursitis (Internal Snapping Hip)

Patients with this condition have anterior hip pain when extending the hip from a flexed position, often associated with intermittent catching, snapping, or popping of the hip.20 Dynamic real-time ultrasonography is particularly useful in evaluating the various forms of snapping hip.8

Occult or Stress Fracture

Occult or stress fracture of the hip should be considered if trauma or repetitive weight-bearing exercise is involved, even if plain radiograph results are negative.21 Clinically, these injuries cause anterior hip or groin pain that is worse with activity.21 Pain may be present with extremes of motion, active straight leg raise, the log roll test, or hopping.22 MRI is useful for the detection of occult traumatic fractures and stress fractures not seen on plain radiographs.23

Transient Synovitis and Septic Arthritis

Acute onset of atraumatic anterior hip pain that results in impaired weight bearing should raise suspicion for transient synovitis and septic arthritis. Risk factors for septic arthritis in adults include age older than 80 years, diabetes mellitus, rheumatoid arthritis, recent joint surgery, and hip or knee prostheses.24 Fever, complete blood count, erythrocyte sedimentation rate, and C-reactive protein level should be used to evaluate the risk of septic arthritis.25,26 MRI is useful for differentiating septic arthritis from transient synovitis.27,28 However, hip aspiration using guided imaging such as fluoroscopy, computed tomography, or ultrasonography is recommended if a septic joint is suspected.29

Osteonecrosis

Legg-Calvé-Perthes disease is an idiopathic osteonecrosis of the femoral head in children two to 12 years of age, with a male-to-female ratio of 4:1.4 In adults, risk factors for osteonecrosis include systemic lupus erythematosus, sickle cell disease, human immunodeficiency virus infection, smoking, alcoholism, and corticosteroid use.30,31 Pain is the presenting symptom and is usually insidious. Range of motion is initially preserved but can become limited and painful as the disease progresses.32 MRI is valuable in the diagnosis and prognostication of osteonecrosis of the femoral head.30,33

Differential Diagnosis of Posterior Hip and Buttock Pain

Piriformis Syndrome and Ischiofemoral Impingement

Piriformis syndrome causes buttock pain that is aggravated by sitting or walking, with or without ipsilateral radiation down the posterior thigh from sciatic nerve compression.34,35 Pain with the log roll test is the most sensitive test, but tenderness with palpation of the sciatic notch can help with the diagnosis.35

Ischiofemoral impingement is a less well-understood condition that can lead to nonspecific buttock pain with radiation to the posterior thigh.36,37 This condition is thought to be a result of impingement of the quadratus femoris muscle between the lesser trochanter and the ischium.

Unlike sciatica from disc herniation, piriformis syndrome and ischiofemoral impingement are exacerbated by active external hip rotation. MRI is useful for diagnosing these conditions.38

Other

Other causes of posterior hip pain include sacroiliac joint dysfunction,39 lumbar radiculopathy,40 and vascular claudication.41 The presence of a limp, groin pain, and limited internal rotation of the hip is more predictive of hip disorders than disorders originating from the low back.42

Differential Diagnosis of Lateral Hip Pain

Greater Trochanteric Pain Syndrome

Lateral hip pain affects 10% to 25% of the general population.43 Greater trochanteric pain syndrome refers to pain over the greater trochanter. Several disorders of the lateral hip can lead to this type of pain, including iliotibial band thickening, bursitis, and tears of the gluteus medius and minimus muscle attachment.43–45 Patients may have mild morning stiffness and may be unable to sleep on the affected side. Gluteus minimus and medius injuries present with pain in the posterior lateral aspect of the hip as a result of partial or full-thickness tearing at the gluteal insertion. Most patients have an atraumatic, insidious onset of symptoms from repetitive use.43,45,46

In conclusion, hip pain is a common complaint which may occur due to a wide variety of health issues. Moreover, the precise location of the patient’s hip pain can provide valuable information to healthcare professionals regarding the underlying cause of the problem. The purpose of the article above was to demonstrate and discuss the evaluation of the patient with hip pain. The scope of our information is limited to chiropractic as well as to spinal injuries and conditions. To discuss the subject matter, please feel free to ask Dr. Jimenez or contact us at 915-850-0900 .

Curated by Dr. Alex Jimenez

Data Sources: We searched articles on hip pathology in American Family Physician, along with their references. We also searched the Agency for Healthcare Research and Quality Evidence Reports, Clinical Evidence, Institute for Clinical Systems Improvement, the U.S. Preventive Services Task Force guidelines, the National Guideline Clearinghouse, and UpToDate. We performed a PubMed search using the keywords greater trochanteric pain syndrome, hip pain physical examination, imaging femoral hip stress fractures, imaging hip labral tear, imaging osteomyelitis, ischiofemoral impingement syndrome, meralgia paresthetica review, MRI arthrogram hip labrum, septic arthritis systematic review, and ultrasound hip pain. Search dates: March and April 2011, and August 15, 2013.

Author Information: Aafp.org

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Additional Topics: Acute Back Pain

Back pain is one of the most prevalent causes of disability and missed days at work worldwide. Back pain attributes to the second most common reason for doctor office visits, outnumbered only by upper-respiratory infections. Approximately 80 percent of the population will experience back pain at least once throughout their life. The spine is a complex structure made up of bones, joints, ligaments, and muscles, among other soft tissues. Because of this, injuries and/or aggravated conditions, such as herniated discs, can eventually lead to symptoms of back pain. Sports injuries or automobile accident injuries are often the most frequent cause of back pain, however, sometimes the simplest of movements can have painful results. Fortunately, alternative treatment options, such as chiropractic care, can help ease back pain through the use of spinal adjustments and manual manipulations, ultimately improving pain relief.

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EXTRA IMPORTANT TOPIC: Hip Pain Chiropractic Treatment

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