Ever feel pain or swelling on the side of your foot? These symptoms may be due to a condition called Cuboid Syndrome, also known as cuboid subluxation or lateral plantar neuritis. In addition to pain in the lateral mid-foot, redness and a restricted range of motion in the ankle may be present. This syndrome is typically associated with an inversion sprain of the ankle. This is when the foot is forced inwards causing the cuboid bone to sublux, or partially dislocate. The cuboid bone is located near the mid-point of the outer side of the foot and is one of the seven tarsal bones that make up the arch of the foot. It connects the foot and ankle as well as provides stability to the foot.
The peroneus longus muscle is a muscle that runs along the outer side of the lower leg and attaches to the lateral side of the foot. Repetitive strain of this muscle due to activities such as ballet, jumping, or running, may place tension on the cuboid bone. Commonly found in athletes, Cuboid Syndrome may also occur in sports such basketball, football, or soccer. Weight-bearing, uneven pavement, or quick changes in direction that occur in sports may aggravate symptoms. A third cause of this syndrome may be an individual’s altered foot biomechanics. Athletes who have over-pronated feet, also known as flat feet, may be more prone to cuboid subluxation.
Imaging such as x-rays, MRIs, and CT scans can be used to rule out other causes of pain. However, a cuboid subluxation can be difficult to diagnose and therefore, must be carefully assessed by a general physician or other health care professional.
Daily strengthening and mobility exercises should be performed on a pain-free basis to prevent the foot and ankle from becoming weak or stiff. Watch the videos below on how to properly perform strengthening exercises:
Other treatment options include foot support such as padding, taping, or orthotics to help stabilize the bones of the midfoot or correct for over-pronation. Rest from repetitive, weight-bearing actions such as jumping or running may help alleviate pain. Ice affected area for 10 minutes at a time to reduce swelling and inflammation. Consult your family physician, physical therapist, or podiatrist to perform a manipulation if the cuboid bone is suspected to be dislocated.