Cuboid Syndrome is a condition of the foot which is often badly recognised and quite often underdiagnosed. It is not common, making up lower than 5% of foot problems. In this problem the cuboid bone is presumed to become partly dislocated from too much traction from peroneus longus tendon that passes around the bone. Whenever a foot is overpronated the assumption is that the cuboid isn't a stable as a pulley when the peroneus longus muscle contracts. Because of this the outside side of the cuboid bone is moved dorsally and the inside part is pulled downwards.
This is more of an overuse type of injury, although the cuboid can also become partially dislocated as part of an immediate lateral ankle sprain. Usually, there is lateral foot pain on weightbearing, usually located around the calcaneocuboid joint and cuboid-metatarsal joints. This may present as vague lateral foot pain. Pushing the cuboid bone upwards from underneath the foot can produce the pain and frequently the range of movement is restricted compared to the other side. There have been no x-ray observations related to cuboid syndrome. There are a variety of other disorders that could mimic cuboid syndrome, including sinus tarsi syndrome, a stress fracture or peroneal tendonitis. It is also regarded as a frequent symptom following plantar fascia surgical release for chronic plantar fasciitis.
The treatment of Cuboid Syndrome starts off with activity changes, so that exercise amounts are limited to what can be tolerated. Ice can be used to assist with the initial pain relief. Taping to immobilize the foot is also a good first line approach, commonly this is followed with foot supports to help support the cuboid bone. There is a specific mobilization which is helpful in cuboid syndrome to handle the subluxation, even though there is some debate surrounding this approach as to exactly what the mobilization is doing.