What is OS Naviculare Type 2?

What is OS Naviculare Type 2?

Type II is a secondary ossification center of the navicular bone and is also referred to as “prehallux”, accounting for approximately 50-60% of accessory navicular bones. It is seen over the medial pole of the navicular bone at between nine and 11 years of age (3).

What is OS Naviculare?

The accessory navicular (os navicularum or os tibiale externum) is an extra bone or piece of cartilage located on the inner side of the foot just above the arch. It is incorporated within the posterior tibial tendon, which attaches in this area. An accessory navicular is congenital (present at birth).

How common is OS Naviculare?

Epidemiology /Etiology. The foot and ankle have numerous accessory ossification areas, with the most common being the accessory tarsal navicular bone which occurs in 4-14% of the population. It first appears in adolescence, with incidence of 4-21% in children.

What causes OS Tibiale Externum?

Some of the common causes for this condition can be: An injury to the foot or ankle structures. Irritation from footwear. Overpronation.

How do you know if you have an extra bone in your foot?

The signs and symptoms of accessory navicular syndrome include: A visible bony prominence on the midfoot (the inner side of the foot, just above the arch) Redness and swelling of the bony prominence. Vague pain or throbbing in the midfoot and arch, usually occurring during or after periods of activity.

Does accessory navicular syndrome go away?

In summary, an accessory navicular is a fairly uncommon condition which is rarely symptomatic. Oftentimes nonsurgical treatment is successful. In the minority of cases, surgical intervention is required. Patients typically do very well with conservative and surgical treatment.

What is the protruding bone on ankle?

The most common fracture is to the bony bump on the outside of the ankle, the lateral malleolus. The lateral malleolus is the bottom of the fibula, the smaller lower leg bone. The bump on the inside of your ankle, the medial malleolus, is less commonly fractured.

Should I buy a horse with navicular?

Navicular disease is a progressive syndrome with limited chances of full recovery. Unless you’re in the business of rescuing animals, then you should always buy a healthy horse. Horses with foot issues will likely need special shoes and require more farrier care than unaffected horses.

What is OS in bones?

5. os – rigid connective tissue that makes up the skeleton of vertebrates. bone.

Is it bad to have an extra bone in your foot?

People who have an accessory navicular often are unaware of the condition if it causes no problems. However, some people with this extra bone develop a painful condition known as accessory navicular syndrome when the bone and/or posterior tibial tendon are aggravated.

Is accessory navicular syndrome rare?

Why do I have an accessory navicular?

The exact cause of accessory navicular bone is unknown; however, it may be related to an incomplete joining (fusion) of bones and connective tissue during development and/or an abnormal separation of affected bones and connective tissue.

What is type 2 accessory navicular?

Type II: consists of an accessory bone, up to 1.2cm in diameter, where synchondrosis develops between it and the navicular. Type III: is the fused accessory navicular resulting in a large cornuate shaped navicular.

How common is an accessory navicular bone?

The foot and ankle have numerous accessory ossification areas, with the most common being the accessory tarsal navicular bone which occurs in 4-14% of the population. An accessory navicular bone is present in ~10% of the population. It first appears in adolescence, with incidence of 4-21% in children.

What is an OS navicularis?

Os naviculare is a large ossicle adjacent to the medial side of the navicular bone. The tibialis posterior tendon often inserts with a broad attachment onto the ossicle.