Shoulder problems

Diagram of the human shoulder joint

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Overview

Shoulder problems, including pain, are one of the more common reasons for physician visits for musculoskeletal symptoms. The shoulder is the most movable joint in the body. However, it is an unstable joint because of the range of motion allowed. It is easily subject to injury because the ball of the upper arm is larger than the shoulder socket that holds it. To remain stable, the shoulder must be anchored by its muscles, tendons, and ligaments. Some shoulder problems arise from the disruption of these soft tissues as a result of injury or from overuse or underuse of the shoulder. Other problems arise from a degenerative process in which tissues break down and no longer function well.

Shoulder pain may be localized or may be referred to areas around the shoulder or down the arm. Disease within the body (such as gallbladder, liver, or heart disease, or disease of the cervical spine of the neck) also may generate pain that travels along nerves to the shoulder. Conversely, pain felt in the region of the shoulder blade or scapula nearly always has its origin in the neck.

Causes

Life Threatening Causes

• Apical lung tumor
• Axillary vein thrombosis
• Endodermal sinus tumor
• Epidermoid carcinoma
• Extragonadal germ cell tumor
• Myocardial ischemia

Common Causes

• Acromioclavicular separation
• Acromioclavicular sprain
• Adhesive capsulitis
• Autoimmune myelopathy
• Bicipital tendinosis
• Bicipital tendonitis
• Brachial plexus lesions
• Broken collarbone
• Broken shoulder blade
• Cervical nerve root compression
• Epidermoid carcinoma
• Extragonadal germ cell tumor
• Facet syndrome
• Frozen shoulder syndrome
• Glenohumeral dislocation
• Humerus juvenile osteochondritis
• Impingement syndrome
• Myocardial ischemia
• Myofascial pain
• Osteoarthritis
• Overuse injuries
• Rotator cuff syndrome
• Rotator cuff tear
• Rotator cuff tendinopathy
• Scapulocostal syndrome
• Seronegative spondyloarthropathy
• Shoulder arthritis
• Shoulder dislocation
• Shoulder impingement syndrome
• Shoulder instability
• Shoulder separation
• Shoulder sprain
• Spinal cord lesion
• Sports injury
• Subacromial inflammatory synovitis
• Subluxation of the glenohumeral joint
• Suprascapular nerve compression
• Supraspinatus tendinopathy
• Symptomatic osteoarthritis
• Tendon tears
• Thoracic outlet syndrome
• Torn rotator cuff
• Xiphoid syndrome

Causes by Organ System

Cardiovascular	Axillary vein thrombosis, Endodermal sinus tumor, Myocardial ischemia, Pulmonary embolus
Chemical/Poisoning	No underlying causes
Dental	No underlying causes
Dermatologic	No underlying causes
Drug Side Effect	Cardura, Doxazosin, Flomax, Tamsulosin, Whiplash
Ear Nose Throat	No underlying causes
Endocrine	Hypophosphatemic rickets
Environmental	No underlying causes
Gastroenterologic	Cholelithiasis, Diaphragmatic irritation , Hepatobiliary disease
Genetic	Spondyloepiphyseal dysplasia tarda
Hematologic
Iatrogenic	Cholelithiasis
Infectious Disease	Herpes zoster, Upper lobe pneumonia
Musculoskeletal/Orthopedic	Acromioclavicular separation, Acromioclavicular sprain, Adhesive capsulitis , Autoimmune myelopathy, Bicipital tendinosis, Bicipital tendonitis, Brachial plexus lesions, Broken collarbone, Broken shoulder blade, Cervical nerve root compression , Epidermoid carcinoma, Extragonadal germ cell tumor, Facet syndrome, Frozen shoulder syndrome, Glenohumeral dislocation, Humerus juvenile osteochondritis, Impingement syndrome, Myocardial ischemia, Myofascial pain, Osteoarthritis, Overuse injuries, Rotator cuff syndrome, Rotator cuff tear, Rotator cuff tendinopathy , Scapulocostal syndrome, Seronegative spondyloarthropathy, Shoulder arthritis, Shoulder dislocation, Shoulder impingement syndrome, Shoulder instability, Shoulder separation, Shoulder sprain, Spinal cord lesion, Sports injury, Subacromial inflammatory synovitis, Subluxation of the glenohumeral joint, Suprascapular nerve compression, Supraspinatus tendinopathy, Symptomatic osteoarthritis, Tendon tears, Thoracic outlet syndrome, Torn rotator cuff, Xiphoid syndrome
Neurologic	Cervical nerve root compression , Cervical spine disease, Parsonage turner syndrome, Suprascapular nerve compression, Syringomyelia, Thoracic outlet syndrome
Nutritional/Metabolic	Hypophosphatemic rickets
Obstetric/Gynecologic	Ectopic pregnancy
Oncologic	Apical lung tumor, Autoimmune myelopathy, Endodermal sinus tumor, Epidermoid carcinoma, Extragonadal germ cell tumor, Pancoast syndrome
Ophthalmologic	No underlying causes
Overdose/Toxicity	No underlying causes
Psychiatric	Functional disorders
Pulmonary	Apical lung tumor, Pancoast syndrome, Pulmonary embolus, Upper lobe pneumonia
Renal/Electrolyte	No underlying causes
Rheumatology/Immunology/Allergy	Adhesive capsulitis , Frozen shoulder syndrome, Impingement syndrome, Osteoarthritis, Parsonage turner syndrome, Polymyalgia rheumatica, Seronegative spondyloarthropathy, Shoulder arthritis, Subacromial bursitis, Supraspinatus tendinopathy, Symptomatic osteoarthritis
Sexual	Herpes zoster
Trauma	Acromioclavicular separation, Acromioclavicular sprain, Brachial plexus lesions, Broken collarbone, Broken shoulder blade, Diaphragmatic irritation , Fracture, Glenohumeral dislocation, Myofascial pain, Overuse injuries, Rotator cuff syndrome, Rotator cuff tear, Shoulder dislocation, Shoulder impingement syndrome, Shoulder instability, Shoulder separation, Shoulder sprain, Spinal cord lesion, Sports injury, Subacromial inflammatory synovitis, Subluxation of the glenohumeral joint, Tendon tears, Torn rotator cuff, Xiphoid syndrome
Urologic	No underlying causes
Miscellaneous	No underlying causes

Causes in Alphabetical Order

• Acromioclavicular separation
• Acromioclavicular sprain
• Adhesive capsulitis
• Apical lung tumor
• Autoimmune myelopathy
• Axillary vein thrombosis
• Bicipital tendinosis
• Bicipital tendonitis
• Brachial plexus lesions
• Broken collarbone
• Broken shoulder blade
• Cardura
• Cervical nerve root compression
• Cervical spine disease
• Cholelithiasis
• Diaphragmatic irritation
• Doxazosin
• Ectopic pregnancy
• Endodermal sinus tumor
• Epidermoid carcinoma
• Extragonadal germ cell tumor
• Facet syndrome
• Flomax
• Fracture
• Frozen shoulder syndrome
• Functional disorders
• Glenohumeral dislocation
• Hepatobiliary disease
• Herpes zoster
• Humerus juvenile osteochondritis
• Hypophosphatemic rickets
• Impingement syndrome
• Myocardial ischemia
• Myofascial pain
• Osteoarthritis
• Overuse injuries
• Pancoast syndrome
• Parsonage turner syndrome
• Polymyalgia rheumatica
• Pulmonary embolus
• Rotator cuff syndrome
• Rotator cuff tear
• Rotator cuff tendinopathy
• Scapulocostal syndrome
• Seronegative spondyloarthropathy
• Shoulder arthritis
• Shoulder dislocation
• Shoulder impingement syndrome
• Shoulder instability
• Shoulder separation
• Shoulder sprain
• Spinal cord lesion
• Spondyloepiphyseal dysplasia tarda
• Sports injury
• Subacromial bursitis
• Subacromial inflammatory synovitis
• Subluxation of the glenohumeral joint
• Suprascapular nerve compression
• Supraspinatus tendinopathy
• Symptomatic osteoarthritis
• Syringomyelia
• Tamsulosin
• Tendon tears
• Thoracic outlet syndrome
• Torn rotator cuff
• Upper lobe pneumonia
• Whiplash
• Xiphoid syndrome

Epidemiology

According to the American Academy of Orthopaedic Surgeons ( AAOS) visits to orthopedic specialists for shoulder pain has been rising since 1998 and in 2005 over 13 million patients sought medical care for shoulder pain, of which only 34% were related to injury .

Shoulder structures and functions

Main article: shoulder

The shoulder joint is composed of three bones: the clavicle (collarbone), the scapula (shoulder blade), and the humerus (upper arm bone) (see diagram). Two joints facilitate shoulder movement. The acromioclavicular (AC) joint is located between the acromion (part of the scapula that forms the highest point of the shoulder) and the clavicle. The glenohumeral joint, to which the term "shoulder joint" commonly refers, is a ball-and-socket joint that allows the arm to rotate in a circular fashion or to hinge out and up away from the body. The "ball" is the top, rounded portion of the upper arm bone or humerus; the "socket," or glenoid, is a dish-shaped part of the outer edge of the scapula into which the ball fits. Arm movement is further facilitated by the ability of the scapula itself to slide along the rib cage. The capsule is a soft tissue envelope that encircles the glenohumeral joint. It is lined by a thin, smooth synovial membrane.

The bones of the shoulder are held in place by muscles, tendons, and ligaments. Tendons are tough cords of tissue that attach the shoulder muscles to bone and assist the muscles in moving the shoulder. Ligaments attach shoulder bones to each other, providing stability. For example, the front of the joint capsule is anchored by three glenohumeral ligaments.

The rotator cuff is a structure composed of tendons that, with associated muscles, holds the ball at the top of the humerus in the glenoid socket and provides mobility and strength to the shoulder joint.

Two filmy sac-like structures called bursae permit smooth gliding between bone, muscle, and tendon. They cushion and protect the rotator cuff from the bony arch of the acromion.

Diagnosis

Following are some of the ways doctors diagnose shoulder problems:

Medical history and physical

• Medical history (the patient tells the doctor about an injury or other condition that might be causing the pain).

• Physical examination to feel for injury and discover the limits of movement, location of pain, and extent of joint instability. However, a systematic review of relevant research found that the accuracy of the physical examination is low.

Diagnostic tests

• Tests to confirm the diagnosis of certain conditions. Some of these tests include:
  • X ray
  • Arthrogram--Diagnostic record that can be seen on an x ray after injection of a contrast fluid into the shoulder joint to outline structures such as the rotator cuff. In disease or injury, this contrast fluid may either leak into an area where it does not belong, indicating a tear or opening, or be blocked from entering an area where there normally is an opening.
  • MRI (magnetic resonance imaging)--A non-invasive procedure in which a machine produces a series of cross-sectional images of the shoulder.
  • Other diagnostic tests, such as injection of an anesthetic into and around the shoulder joint.

Dislocation

Main article: Dislocated shoulder

Description

The shoulder joint is the most frequently dislocated major joint of the body. In a typical case of a dislocated shoulder, a strong force that pulls the shoulder outward (abduction) or extreme rotation of the joint pops the ball of the humerus out of the shoulder socket. Dislocation commonly occurs when there is a backward pull on the arm that either catches the muscles unprepared to resist or overwhelms the muscles. When a shoulder dislocates frequently, the condition is referred to as shoulder instability. A partial dislocation where the upper arm bone is partially in and partially out of the socket is called a subluxation. In the medical community, dislocation is commonly referred to as luxation.

Signs and diagnosis

The shoulder can dislocate either forward, backward, or downward. Not only does the arm appear out of position when the shoulder dislocates, but the dislocation also produces pain. Muscle spasms may increase the intensity of pain. Swelling, numbness, weakness, and bruising are likely to develop. Problems seen with a dislocated shoulder are tearing of the ligaments or tendons reinforcing the joint capsule and, less commonly, nerve damage. Doctors usually diagnose a dislocation by a physical examination, and x rays may be taken to confirm the diagnosis and to rule out a related fracture.

Treatment

Doctors treat a dislocation by putting the head of the humerus back into the joint socket (glenoid fossa) of the scapula — a procedure called manipulation and reduction (M&R). This is usually followed up with an x ray to make sure the reduction didn't fracture the surrounding bones. The arm is then immobilized in a sling or a device called a shoulder immobilizer for several days. Usually the doctor recommends resting the shoulder and applying ice three or four times a day. After pain and swelling have been controlled, the patient enters a rehabilitation program that includes exercises to restore the range of motion of the shoulder and strengthen the muscles to prevent future dislocations. These exercises may progress from simple motion to the use of weights.

After treatment and recovery, a previously dislocated shoulder may remain more susceptible to reinjury, especially in young, active individuals. Ligaments are stretched and may tear due to dislocation. Torn ligaments and other problems resulting from dislocation can increase the chance of repeated dislocation. A shoulder that dislocates severely or often, injuring surrounding tissues or nerves, usually requires surgery to repair the damaged parts of the shoulder.

Sometimes the doctor performs surgery through a tiny incision into which a small scope (arthroscope) is inserted to observe the inside of the joint. After this procedure, called arthroscopic surgery, the shoulder is generally restrained by a sling for 3 to 6 weeks and full recovery, including physical therapy takes several months. Arthroscopic techniques involving the shoulder are relatively new and many surgeons prefer to repair a recurrent dislocating shoulder by the time-tested open surgery under direct vision. There are usually fewer repeat dislocations and improved movement following open surgery, but it may take a little longer to regain motion..

Separation

Main article: Separated shoulder

Description

A shoulder separation occurs where the collarbone (clavicle) meets the shoulder blade (scapula). When ligaments that hold the AC (acromioclavicular) joint together are partially or completely torn, the outer end of the clavicle may slip out of place, preventing it from properly meeting the scapula. Most often the injury is caused by a blow to the shoulder or by falling on an outstretched hand. After injury it is hard to do a 180 degrees rotation.

Signs and diagnosis

Shoulder pain or tenderness and, occasionally, a bump in the middle of the top of the shoulder (over the AC joint) are signs that a separation may have occurred. Sometimes the severity of a separation can be detected by taking x rays while the patient holds a light weight that pulls on the muscles, making a separation more pronounced.

Treatment

A shoulder separation is usually treated conservatively by rest and wearing a sling. Soon after injury, an ice bag may be applied to relieve pain and swelling. After a period of rest, a therapist helps the patient perform exercises that put the shoulder through its range of motion. Most shoulder separations heal within 2 or 3 months without further intervention. However, if ligaments are severely torn, surgical repair may be required to hold the clavicle in place. A doctor may wait to see if conservative treatment works before deciding whether surgery is required

Sternoclavicular separation

Description

While not directly a shoulder problem, this may affect shoulder functionality due to problems with sternoclavicular rotation. A sternoclavicular separation occurs when the sternum separates from the clavicle at the sternoclavicular joint. Sternoclavicular separations are rare and generally caused by accident. If the clavicle is separated posteriorly (i.e. the clavicle separates and goes behind the sternum) the situation can be dangerous and the clavicle can cause damage to interior arteries, veins or organs.

Signs and diagnosis

An X-Ray or CT-Scan my be necessary to accurately diagnose a sternoclavicular separation.

Treatment

Treatment consists of the standard use of plenty of rest, icing, NSAIDs and a sling. The joint may need to be reduced (I.E. put back in place), especially after posterior separations. In severe cases, surgery may be advised.

Tendinitis, Bursitis, Impingement syndrome, and Rotator cuff tears

Main article: Rotator cuff

Description

These conditions are closely related and may occur alone or in combination. If the rotator cuff and bursa are irritated, inflamed, and swollen, they may become squeezed between the head of the humerus and the acromion. Repeated motion involving the arms, or the aging process involving shoulder motion over many years, may also irritate and wear down the tendons, muscles, and surrounding structures.

Tendinitis is inflammation (redness, soreness, and swelling) of a tendon. In tendinitis of the shoulder, the rotator cuff and/or biceps tendon become inflamed, usually as a result of being pinched by surrounding structures. The injury may vary from mild inflammation to involvement of most of the rotator cuff. When the rotator cuff tendon becomes inflamed and thickened, it may get trapped under the acromion. Squeezing of the rotator cuff is called impingement syndrome.

An inflamed bursa is called bursitis. Tendinitis and impingement syndrome are often accompanied by inflammation of the bursa sacs that protect the shoulder. Inflammation caused by a disease such as rheumatoid arthritis may cause rotator cuff tendinitis and bursitis. Sports involving overuse of the shoulder and occupations requiring frequent overhead reaching are other potential causes of irritation to the rotator cuff or bursa and may lead to inflammation and impingement.

Signs

Signs of these conditions include the slow onset of discomfort and pain in the upper shoulder or upper third of the arm and/or difficulty sleeping on the shoulder. Tendinitis and bursitis also cause pain when the arm is lifted away from the body or overhead. If tendinitis involves the biceps tendon (the tendon located in front of the shoulder that helps bend the elbow and turn the forearm), pain will occur in the front or side of the shoulder and may travel down to the elbow and forearm. Pain may also occur when the arm is forcefully pushed upward overhead.

Diagnosis

Diagnosis of tendinitis and bursitis begins with a medical history and physical examination. X rays do not show tendons or the bursae but may be helpful in ruling out bony abnormalities or arthritis. The doctor may remove and test fluid from the inflamed area to rule out infection. Ultrasound scans are frequently used to confirm a suspected tendinitis or bursitis as well as rule out a tear in the rotator cuff muscles. Impingement syndrome may be confirmed when injection of a small amount of anesthetic (lidocaine hydrochloride) into the space under the acromion relieves pain.

Treatment

The first step in treating these conditions is to reduce pain and inflammation with rest, ice, and anti-inflammatory medicines such as aspirin, naproxen (Naprosyn), ibuprofen (Nurofen, Advil, Motrin, or Nuprin), or COX-2 selective inhibitors (Celebrex, Vioxx, or Mobic). In some cases the doctor or therapist will use ultrasound (gentle sound-wave vibrations) to warm deep tissues and improve blood flow. Gentle stretching and strengthening exercises are added gradually. These may be preceded or followed by use of an ice pack. If there is no improvement, the doctor may inject a corticosteroid medicine into the space under the acromion. While steroid injections are a common treatment, they must be used with caution because they may lead to tendon rupture. If there is still no improvement after 6 to 12 months, the doctor may perform either arthroscopic or open surgery to repair damage and relieve pressure on the tendons and bursae.

The brand names included here are provided as examples only. If a particular brand name is not mentioned, this does not mean or imply that the product is unsatisfactory.

Rotator cuff tear

Main article: Rotator cuff tear

The term "rotator cuff" refers to a group of four tendons that blend together as they attach to the upper end of the arm bone (humerus). Normally these tendons transmit the force of muscles originating on the shoulder blade (scapula) to the arm providing motion and stability. The most commonly affected tendon is that of the supraspinatus muscle. Defects in the rotator cuff can come from an injury (cuff tear) or from degeneration (cuff wear). The degree to which a tendon is reparable depends on its quantity and quality. Degenerated tendons are often frail and retracted and may not be amenable to repair. Individuals that are elderly, smokers, or those having had cortisone injections often have weaker tendon tissue that fails without a significant injury. By contrast those whose tendon was torn by a substantial fall often have good quality tendon that can be repaired if surgery is performed promptly after the injury. The symptoms of rotator cuff disease include difficulty lifting the arm. Repair of a rotator cuff requires that the tendon be securely anchored to the bone at surgery and that the repair be protected for several months during healing. Further information that should be considered in the treatment of rotator cuff tears can be found at University of Washington School of Medicine.

SLAP tear (lesion)

Main article: Slap lesion

A SLAP (superior labrum anterior to posterior) tear occurs when the cartilage of the shoulder (labrum) delaminates from glenoid. This causes an instability of the shoulder, typically in overhead movements.

Symptoms

Symptoms include a dull ache deep in the shoulder joint, trouble sleeping due to the instability and discomfort, and extreme weakness in overhead activities

Diagnosis

The best diagnosis for a SLAP tear is a clinical exam followed by an MRI combined with a contrast agent.

Treatment

Very few cases recover to complete mobility without surgical intervention. Some patients are able to strengthen their shoulders to limit the day to day dull ache, but with limited mobility and function. Surgery reattaches the labrum to the glenoid through the use of surgical anchors.

Recovery

Recovery is often a lengthly process. The first four or so weeks the patient is required to wear a sling. Following this, there is a month of physical therapy to regain range of motion. At two months limited strength training occurs. At six months the patient is typically released to full active use, although many patients find that full recovery take longer than this.

Frozen shoulder (adhesive capsulitis)

Main article: Frozen shoulder

As the name implies, movement of the shoulder is severely restricted in people with a "frozen shoulder". This condition, which doctors call adhesive capsulitis, is frequently caused by injury that leads to lack of use due to pain. Rheumatic disease progression and recent shoulder surgery can also cause frozen shoulder. Intermittent periods of use may cause inflammation. Adhesions (abnormal bands of tissue) grow between the joint surfaces, restricting motion. There is also a lack of synovial fluid, which normally lubricates the gap between the arm bone and socket to help the shoulder joint move. It is this restricted space between the capsule and ball of the humerus that distinguishes adhesive capsulitis from a less complicated painful, stiff shoulder. People with diabetes, stroke, lung disease, rheumatoid arthritis, and heart disease, or who have been in an accident, are at a higher risk for frozen shoulder. The condition rarely appears in people under the age of 40.

Fracture

Further information: [[:clavicle fracture]], [[:scapular fracture]], and [[:humerus fracture]]

Description

A bone fracture of the shoulder involves a partial or total crack through one of the three bones in the shoulder, the clavicle, the scapula, and the humerus. The break in a bone usually occurs as a result of an impact injury, such as a fall or blow to the shoulder. Fractures usually involve the clavicle or the neck (area below the ball) of the humerus. Fractures of the scapula sometimes occur through the coracoid process

Signs and diagnosis

A shoulder fracture that occurs after a major injury is usually accompanied by severe pain. Within a short time, there may be redness and bruising around the area. Sometimes a fracture is obvious because the bones appear out of position. (However this occur in non-involved dislocations and separations.) Both diagnosis and severity can be confirmed by x rays.

Treatment

When a fracture occurs, the doctor tries to bring the bones into a position that will promote healing and restore arm movement. If the clavicle is fractured, the patient must at first wear a strap and sling around the chest to keep the clavicle in place. After removing the strap and sling, the doctor will prescribe exercises to strengthen the shoulder and restore movement. Surgery is occasionally needed for certain clavicle fractures, especially for disunions.

Fracture of the neck of the humerus is usually treated with a sling or shoulder immobilizer. If the bones are out of position, surgery may be necessary to reset them. Exercises are also part of restoring shoulder strength and motion.

Arthritis of the shoulder (glenohumeral joint)

Description

In arthritis of the shoulder, the cartilage of the ball and socket (glenohumeral joint) is lost so that bone rubs on bone. It may be caused by wear and tear (degenerative joint disease), injury (traumatic arthritis), surgery (secondary degenerative joint disease), inflammation (rheumatoid arthritis) or infection (septic arthritis).

Signs and diagnosis

Arthritis of the shoulder causes pain and loss of motion and use of the shoulder.

X-rays of the shoulder show loss of the normal space between the ball and socket.

Treatment

Early on arthritis of the shoulder can be managed with mild analgesics and gentle exercises, [2] Known gentle exercises include warm water therapy pool exercises that are provided by a trained and licensed physical therapist; approved land exercises to assure free movement of the arthritic area; cortisone injections (administered at the minimum of every six months according to orthopedic physicians) to reduce inflammation; ice and hot moist pact application (use of ice water machines designed to strap onto your shoulder are the most efficient way to apply ice but large ice packs commonly used for low back pain that can purchased at select pharmacies and medical supply stores are very effective; for more efficient moist heat use those granule packs sewed inside fabric and placed into a microwave oven for approximately two minutes -it is recommended that moist heat be applied upon first rising if pain exists, prior to going to bed for the night or even if you are awakened by shoulder pain during the night. Moist heat is preferred over ice whereas ice is preferred if inflammation occurs during the daytime hours. It is recommended to see your doctor about your pain if it persists over a few months time. You may have an event that creates a more acute pain. That is not the time to pursue more aggressive means of diagnosis and treatment. Local analgesics along with ice or moist heat are adequate treatments for acute pain. Complementary medicine has been known to be effective but you should not engage in such treatment without the knowledge of your physician and/or orthopedic physician. One treatment that is usually helpful is therapeutic massage by a licensed massage therapist. Another is acupuncture by a licensed acupuncturist. And, finally, an over-the-counter supplement, Glucosamine Chondroitin has been reported to be effective if taken as directed. Use of these therapies must always be reported to your doctor/s as there may be a contraindicating factor unknown to you.

In the case of rheumatoid arthritis, specific medications selected by a rheumatologist may offer substantial relief.

When exercise and medication are no longer effective, shoulder replacement surgery for arthritis may be considered. In this operation, a surgeon replaces the shoulder joint with an artificial ball for the top of the humerus and a cap (glenoid) for the scapula. Passive shoulder exercises (where someone else moves the arm to rotate the shoulder joint) are started soon after surgery. Patients begin exercising on their own about 3 to 6 weeks after surgery. Eventually, stretching and strengthening exercises become a major part of the rehabilitation programme. The success of the operation often depends on the condition of rotator cuff muscles prior to surgery and the degree to which the patient follows the exercise programme.

In young and active patients a partial shoulder replacement with a non-prosthetic glenoid arthroplasty may also be a consideration <http://www.orthop.washington.edu/reamandrun>.

Arthritis or Osteolysis of the AC (acromioclavicular) joint

Description

The acromioclavicular articulation consists of the acromioclavicular ligament and a small disk of cartilage located in between the acromion and the clavicle. This disk can wear down through injury, extreme joint stress (via bodybuilding) or normal wear.

Signs and diagnosis

Pain is perceived on shoulder motion, especially on certain movements. Often a crossover arm test is utilized in diagnosis because this compresses the AC joint, exacerbating the symptoms. X-rays of the shoulder would show joint may show either arthritic changes of the ac joint or osteolysis.

Treatment

Conservative treatment for this joint is similar to treatments for other types of arthritis, including restricting activity, anti-inflammatory medications (or supplements), physical therapy, and occasionally cortisone shots. If the pain is severe, surgery may be an option. Surgical treatment involves cutting a very small portion off the clavicle end and letting scar tissue fill in its place. Some portions of the acromioclavicular ligament may still remain attached.

Temporary, emergency treatment

A mnemonic for the basic treatment principles of any musculoskeletal problems is PRICE: Protection, Rest, Ice, Compression, and Elevation:

• Protection: Guard the shoulder to prevent further injury.
• Rest: Reduce or stop using the injured area for 48 hours.
• Ice: Put an ice pack on the injured area for 20 minutes at a time, 4 to 8 times per day. Use a cold pack, ice bag, or a plastic bag filled with crushed ice that has been wrapped in a towel.
• Compression: Compress the area with bandages, such as an elastic wrap, to help stabilize the shoulder.
• Elevation: Keep the injured area elevated above the level of the heart. Use a pillow to help elevate the injury.

If pain and stiffness persist, see a doctor.

Source

This article contains and extends text from the public domain document "Questions and Answers about Shoulder Problems", NIH Publication No. 01-4865, available from URL http://www.niams.nih.gov/hi/topics/shoulderprobs/shoulderqa.htm

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