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Author: Admin | 2025-04-28
A common lump or bump is just in front of the weight-bearing portion of the heel. This prominence is usually a hard bony mass that protrudes outward. It is due to a bony enlargement of the Navicular bone. Some people have a natural enlargement in this area while other people have an extra bone in this area. This condition is often referred to as Os Navicularis. This condition is often associated with a flat foot deformity. A very powerful tendon from a muscle in the leg called the posterior tibial tendon partially attaches into this area. If the navicular bone is naturally enlarged or there is a second bone present then the tendon dose not function properly and cannot support the arch of the foot adequately. Over time, this will cause a weakening of the tendon causing an entire collapse of the arch of the foot. This condition called Posterior Tibial Tendon Dysfunction is a very serious condition that should be treated promptly and aggressively. The bony prominence of the navicular bone may cause secondary pressure in shoes resulting in pain. Treatment of the prominence of the navicular bone consists of padding to reduce shoe pressure, functional foot orthosis to treat the associated flat foot deformity and the possible onset of posterior tibial tendon dysfunction, or surgery. Following any surgical intervention in this area, the patient should be placed in a functional foot orthosis. The surgical removal of the bony prominence does not correct a flat foot or prevent the occurrence of posterior tibial tendon dysfunction.Article provided by PodiatryNetwork.com.
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