Cuboid Syndrome is a condition in the foot which is frequently poorly recognised and frequently underdiagnosed. It is not common, making up lower than 5% of foot problems. In this condition the cuboid bone is believed to become partly subluxed from excessive traction from peroneus longus tendon as it passes under the bone. When a foot is overpronated the assumption is that the cuboid is not a stable as a pulley once the peroneus longus muscle acts. Because of this the outside side of the cuboid bone is moved upwards and the medial part is pulled downwards.
Cuboid Syndrome is really an overuse type of injury, although the cuboid can also become subluxed as part of an immediate lateral ankle sprain. Clinically, there is lateral foot pain on standing, typically located around the calcaneocuboid joint and cuboid-metatarsal joints. This may present as vague outside foot pain. Pressing the cuboid bone dorsally from under the foot can create the symptoms and frequently the range of motion is restricted when compared to the other side. There have been no specific x-ray observations regarding cuboid syndrome. There are a number of other disorders which could imitate cuboid syndrome, such as sinus tarsi syndrome, a stress fracture and peroneal tendonitis. It is also regarded as a frequent symptom following plantar fascia surgical release for recalcitrant plantar fasciitis.
Dealing with Cuboid Syndrome starts off with exercise changes, making sure that activity levels are limited to what can be tolerated. Ice may be used to assist with the early pain relief. Taping to immobilize the foot is also a good first line approach, commonly this is followed by foot orthoses to help stabilize the cuboid bone. There is a distinct manipulation which is useful in cuboid syndrome to deal with the subluxation, though there is some discussion surrounding this technique as to exactly what the manipulation is doing.