Overview An Achilles tendon rupture, also known as an Achilles tendon tear, is the snapping or pulling apart of the Achilles tendon into two pieces. Achilles tendon ruptures can be full ruptures or partial ruptures. A physician may be required to distinguish between acute Achilles tendinosis and a partial Achilles tendon rupture. Tennis Leg is a rupture of the connection between the calf muscle and the Achilles tendon. Achilles tendonitis is an inflammation of the Achilles tendon: it is much less common than, but often confused with, Achilles tendinosis. Achilles tendons can also be lacerated or crushed. Causes The Achilles tendon can grow weak and thin with age and lack of use. Then it becomes prone to injury or rupture. Achilles tendon rupture is more common in those with preexisting tendinitis of the Achilles tendon. Certain illnesses (such as arthritis and diabetes) and medications (such as corticosteroids and some antibiotics, including quinolones such as levofloxacin [Levaquin] and ciprofloxacin [Cipro]) can also increase the risk of rupture. Rupture most commonly occurs in the middle-aged male athlete (the weekend warrior who is engaging in a pickup game of basketball, for example). Injury often occurs during recreational sports that require bursts of jumping, pivoting, and running. Most often these are tennis, racquetball, basketball, and badminton. The injury can happen in the following situations. You make a forceful push-off with your foot while your knee is straightened by the powerful thigh muscles. One example might be starting a foot race or jumping. You suddenly trip or stumble, and your foot is thrust in front to break a fall, forcefully overstretching the tendon. You fall from a significant height or abruptly step into a hole or off of a curb. Symptoms An Achilles tendon rupture is when the tendon that connects the heel bone to the calf muscle tears and the fibers separate. This happens mostly between the ages of 30 and 50, and usually is caused by sports. Symptoms of Achilles tendon rupture include the following. A pop or snap when the tendon tears. Severe pain in back of the ankle, making it nearly impossible to walk. Swelling and discoloration. Tenderness. Inability to rise on toes. A gap in the back of the ankle where the tendons are separated. Diagnosis Some patients mistakenly believe the tendon is working if they can push the foot down, however, patients will usually be able to move the foot up and down while sitting because the other surrounding muscles and tendons are still intact. Trying to push up while standing and applying body weight to the foot will reveal the true weakness. Sensation and circulation to the foot and ankle will be normal. In addition, x-rays will be normal unless the Achilles injury involves pulling off (avulsion) of the bone on the calcaneus (heel bone). This is quite rare, occurring in only a small fraction of patients with Achilles injuries. Patients suffering this type of Achilles avulsion injury tend to be older with weaker bone. Imaging Studies. Plain x-rays will be negative in patients who have suffered an Achilles tendon rupture. The rupture can be seen on ultrasound or MRI. However, these studies are not indicated for acute ruptures unless there is some uncertainty about the diagnosis. For chronic problems of the Achilles or ruptures that are old, an MRI may be very helpful. Non Surgical Treatment Treatment of a ruptured Achilles tendon is usually conservative (non-operative) in a Controlled Motion Ankle (CAM) Boot or it may require surgery. The current consensus based on research is to treat them conservatively since the functional outcome and chance of re-rupture is similar (7% to 15%) using both approaches but surgical intervention has a higher risk of infection. Achilles tendon surgery is usually considered if your Achilles has re-ruptured or there is delay of two weeks between the rupture and the diagnosis and commencement of conservative bracing and treatment. Surgical Treatment Surgical techniques for rupture repair are varied but usually involve reapproximation of the torn ends of the Achilles tendon, sometimes reinforced by the gastrocsoleus aponeurosis or plantaris tendon. Open reconstruction is undertaken using a medial longitudinal approach. Studies indicate that patients who undergo percutaneous, rather than an open, Achilles tendon rupture repair have a minimal rate of infection but a high rate of sural nerve entrapment (16.7% of treated cases).