Insertional Achilles Tendonitis Mri
Overview
Achilles tendinitis. Achilles tendonitis is inflammation of the Achilles tendon, the largest tendon in the body, which runs from the calf to the heel bone. Noninsertional Achilles tendonitis affects fibers in the middle of the tendon. Insertional Achilles tendonitis affects the lower portion of the tendon where it attaches to the heel bone. Both types can result from repetitive stress to the tendon or from overstressing the tendon during exercise. Damaged tendon fibers can calcify and bone spurs can form where the tendon attaches to the bone. Symptoms may include pain and stiffness of the tendon - which may occur from either inactivity (such as first thing in the morning) or after activity - thickening or swelling of the tendon or bone spurs.
Causes
Over-pronation, injury and overstresses of the tendon are some of the most common causes. Risk factors include tight heel cords, poor foot alignment, and recent changes in activities or shoes. During a normal gait cycle, the upper and lower leg rotate in unison (i.e. internally during pronation and externally during supination). However, when a person over-pronates, the lower leg is locked into the foot and therefore continues to rotate internally past the end of the contact phase while the femur begins to rotate externally at the beginning of midstance. The Gastrocnemius muscle is attached to the upper leg and rotates externally while the Soleus muscle is attached to the lower leg and rotates internally during pronation. The resulting counter rotation of the upper and lower leg causes a shearing force to occur in the Achilles tendon. This counter rotation twists the tendon at its weakest area, namely the Achilles tendon itself, and causes the inflammation. Since the tendon is avascular, once inflammation sets in, it tends to be chronic.
Symptoms
Symptoms of Achilles tendinitis and tendinosis include recurring localized heel pain, sometimes severe, along the achilles tendon during or after exercise. Pain often begins after exercise and gradually worsens. Morning tenderness or stiffness about an inch and a half above the point where the Achilles tendon is attached to the heel bone. Sluggishness in your leg. Mild to severe swelling. Stiffness that generally diminishes as the tendon warms up with use.
Diagnosis
A podiatrist can usually make the diagnosis by clinical history and physical examination alone. Pain with touching or stretching the tendon is typical. There may also be a visible swelling to the tendon. The patient frequently has difficulty plantarflexing (pushing down the ball of the foot and toes, like one would press on a gas pedal), particularly against resistance. In most cases X-rays don't show much, as they tend to show bone more than soft tissues. But X-rays may show associated degeneration of the heel bone that is common with Achilles Tendon problems. For example, heel spurs, calcification within the tendon, avulsion fractures, periostitis (a bruising of the outer covering of the bone) may all be seen on X-ray. In cases where we are uncertain as to the extent of the damage to the tendon, though, an MRI scan may be necessary, which images the soft tissues better than X-rays. When the tendon is simply inflamed and not severely damaged, the problem may or may not be visible on MRI. It depends upon the severity of the condition.
Nonsurgical Treatment
Treatment will depend on the severity of the injury. In general terms, the longer the symptoms are present before treatment begins, the longer the timeframe until complete recovery is achieved. Complete recovery can take between three and nine months. Initial treatment of Achilles tendonitis includes, Rest, to avoid further injury to the area. Ice, to reduce inflammation, Elevation, to reduce swelling. Bandaging or strapping, to support the area and restrict movement of the tendon. Anti-inflammatory medications to reduce pain and inflammation. (Cortisone (steroid) injections to reduce inflammation are not usually recommended as they may weaken the tendon and increase the risk of rupture). Other treatments include, Physiotherapy, Physiotherapy plays an important role in the treatment of Achilles tendonitis. This generally focuses on two main areas - treatment and rehabilitation. Treatment may involve such techniques as massage, ultrasound, acupuncture and gentle stretching. Rehabilitation involves the development of an individualised recovery programme, the most important aspect of which is strengthening. Strengthening of the muscles surrounding the Achilles tendon helps to promote healing in the tendon itself. Strengthening is achieved through the use of specific exercises, which will be taught by the physiotherapist. One such exercise is eccentric loading, which involves contracting the calf muscle while it is being stretched. It is common for the rehabilitation programme to take up to three months. Podiatry, including gait analysis and the fitting of orthotic devices to support the foot and reduce stress on the tendon, may be recommended. For cases of Achilles tendonitis that do not respond to initial treatment, casting or splinting of the affected foot may be recommended to allow it to rest completely.
Surgical Treatment
Following the MRI or ultrasound scan of the Achilles tendon the extent of the degenerative change would have been defined. The two main types of operation for Achilles tendinosis are either a stripping of the outer sheath (paratenon) and longitudinal incisions into the tendon (known as a debridement) or a major excision of large portions of the tendon, the defects thus created then being reconstructed using either allograft (donor tendon, such as Wright medical graft jacket) or more commonly using a flexor hallucis longus tendon transfer. In cases of Achilles tendonosis with more minor degrees of degenerative change the areas can be stimulated to repair itself by incising the tendon, in the line of the fibres, which stimulates an ingrowth of blood vessels and results in the healing response. With severe Achilles tendonosis, occasionally a large area of painful tendon needs to be excised which then produces a defect which requires filling. This is best done by transferring the flexor hallucis longus muscle belly and tendon, which lies adjacent to the Achilles tendon. This results in a composite/double tendon after the operation, with little deficit from the transferred tendon.
Prevention
Suggestions to reduce your risk of Achilles tendonitis include, icorporate stretching into your warm-up and cool-down routines. Maintaining an adequate level of fitness for your sport. Avoid dramatic increases in sports training. If you experience pain in your Achilles tendon, rest the area. Trying to ?work through? the pain will only make your injury worse. Wear good quality supportive shoes appropriate to your sport. If there is foot deformity or flattening, obtain orthoses. Avoid wearing high heels on a regular basis. Maintaining your foot in a ?tiptoe? position shortens your calf muscles and reduces the flexibility of your Achilles tendon. An inflexible Achilles tendon is more susceptible to injury. Maintain a normal healthy weight.
