Charcot foot describes a foot deformity in which the foot takes on an abnormal foot shape that is often flattened and even rocker-bottom, following the collapse of the joints in the feet.
Charcot foot is caused by the weakening of the bones and joints in people that have significant damage to their nerves, known as neuropathy. Neuropathy is a common complication of diabetes, though can also be caused by other conditions such as alcoholism. As the bones weaken, they are vulnerable to fracturing and dislocating. Because neuropathy impacts a person’s ability to feel and detect pain, they may continue to walk and cause subsequent fractures and damage. Because no impact trauma (like a fall or a hit) has occurred, they won’t realise that the risk of a fracture is present. Ultimately, this leads to the collapse of the joints in the feet. A bone fracture, break, or sprain that is not effectively managed can also create the right conditions that trigger a chain of events that lead to Charcot foot.
Symptoms begin at the foot and ankle and may include:
As fractures and dislocations occur and set in an abnormal position, structural foot deformities can be seen.
Because the effects of Charcot foot can be limb-threatening, effective management must be undertaken. Each case is assessed independently and takes into consideration the extent of the changes, your risk and current symptoms. Treatment may include:
Because the new foot shape can place high pressure at various areas of the foot, it can create complications such as ulcers which are then vulnerable to infection, so the management plan will focus on reducing this risk. High-impact activities that put the feet at risk of further injury will also need to be re-evaluated, especially if only one foot has been affected and there is a significant risk for the other foot to be affected too. Your GP and podiatrist will work together to provide the best outcomes for your feet and address all of your individual needs. In some cases, surgery may be indicated.
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