Brachymetatarsia is a medical condition in which one or multiple metatarsals are unusually shorter than the rest. It most commonly occurs in the fourth toe. The main cause of brachymetatarsia is that the growth plate in that bone closes prematuarely, resulting in the bone not being fully developed. Once the plate has closed, the bone will not grow anymore.
Even though it may seem minor, brachymetatarsia disrupts the physiology of the foot, mainly interrupting the weight distribution. When a person begins to walk, the weight of the body starts in the fifth toe, and gets passed along until it reached the first toe. If the fourth toe is shorter than the fifth toe, the weight cannot be accurately transferred to the third toe. This means the other toes of the body are given excess weight.
Brachymetatarsia Treatment
There aren’t many treatment options for people with brachymetatarsia. Shoes with padding and orthotics can help deal with the weight distribution and excess pressure. In some rare cases, surgery may be an option. In this procedure, the shortened toe is cut and a small pieces of bone is inserted between the cut pieces. However, in most cases of brachymetatarsia the toes is too short and surgery is not an option.