Overview The Achilles tendon attaches the calf muscles in the leg to the heel bone. It is the largest yet most exposed tendon in the body. An Achilles tendon rupture injury is when the tendon fibres tear, causing symptoms of pain and loss of function. A rupture can be either partial or complete and treatment may involve surgery. Achilles tendon rupture is most common in weekend athletes trying to train too hard and is least common in well-trained professional athletes. The injury is more common in men than in women and the frequency of rupture increases over the age of 30 years. Causes Repeated stress from a variety of causes is often the cause of Achilles tendon injury. The stress may occur from any of the following. Excessive activity or overuse. Flat feet. Poorly fitting or inadequate shoes. Inadequate warm-up or proper conditioning. Jogging or running on hard surfaces. Older recreational athlete. Previous Achilles tendon injury (tendonitis/rupture). Repeated steroid injections. Sudden changes in intensity of exercise. Use of fluoroquinolone antibiotics (especially in children). Trauma to the ankle. Tense calf muscles prior to exercise. Weak calf muscles. Symptoms Following are a few of the symptoms usually associated with an Achilles tendon rupture. Sudden, severe pain, swelling, bruising, difficulty walking. Sometimes a gap may be felt in the tendon. The most common ways an Achilles tendon rupture is diagnosed are clinical history (presenting symptoms). Thompson or Simmonds? test, positive if when squeezing the calf there is no foot movement (passive planter flextion). O?Brien?s test, needles are placed into the tendon; tendon is intact if when the foot is moved up and down, the needle hub moves in the same direction as the toes (opposite direction of the tendon) Ultrasound and MRI, because these technologies involve an added expense, they are usually employed only to confirm the diagnosis. Diagnosis The actual area of an Achilles tendon rupture cannot be seen on x-ray. Therefore, although x-rays are often done to rule out bony injuries in individuals with an Achilles tendon rupture these x-rays are usually normal. Diagnostic ultrasound of the tendon can be performed to assess the integrity of the tendon. Other diagnostic tests, such as MRI's, may also be required in difficult cases. Non Surgical Treatment Non-surgical treatment of Achilles tendon rupture is usually reserved for patients who are relatively sedentary or may be at higher risk for complications with surgical intervention (due to other associated medical problems). This involves a period of immobilization, followed by range of motion and strengthening exercises; unfortunately, it is associated with a higher risk of re-rupture of the tendon, and possibly a less optimal functional outcome. Surgical Treatment There are a variety of ways to repair an Achilles tendon rupture. The most common method is an open repair. This starts with an incision made on the back of the lower leg starting just above the heel bone. After the surgeon finds the two ends of the ruptured tendon, these ends are sewn together with sutures. The incision is then closed. Another repair method makes a small incision on the back of the lower leg at the site of the rupture. A series of needles with sutures attached is passed through the skin and Achilles tendon and then brought out through the small incision. The sutures are then tied together. The best surgical technique for your Achilles rupture will be determined by your orthopaedic foot and ankle surgeon.