Cuboid Syndrome is a problem of the foot that is commonly poorly recognised and quite often underdiagnosed. It's not common, making up lower than 5% of foot problems. In this condition the cuboid bone is believed to become partly dislocated from excessive traction from peroneus longus tendon which 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 acts. As a result the outside aspect of the cuboid bone is moved upwards and the medial aspect is pulled downwards.
Cuboid Syndrome is more of an overuse type injury, although the cuboid might also become partially dislocated as part of an immediate lateral ankle sprain.Usually, there is lateral foot pain when standing, typically found around the calcaneocuboid joint and cuboid-metatarsal joints. This may present as vague lateral foot pain. Pressing the cuboid bone upwards from under the foot can produce the symptoms and typically the range of movement is restricted when compared to the other side. There have been no x-ray results associated with cuboid syndrome. There are a variety of other conditions that can imitate cuboid syndrome, including sinus tarsi syndrome, a stress fracture and peroneal tendonitis. It is also considered a common symptom following plantar fascia surgical release for recalcitrant plantar fasciitis.
The treatment of cuboid syndrome starts off with exercise changes, so that activity amounts are limited to what can be tolerated. Ice may be used to assist with the initial pain relief. Taping to immobilize the foot is another excellent first line approach, commonly this is followed with foot orthotics to help support the cuboid bone. There is a distinct mobilization that is useful in cuboid syndrome to handle the subluxation, though there is some debate around this approach as to precisely what the mobilization is achieveing.