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 and can lead to Accessory Navicular Syndrome.

What is os tibiale externum?

The accessory navicular, or os tibiale externum, is an accessory bone on the medial side of the navicular of the foot at the insertion of the posterior tibial tendon (PTT). It can cause obvious hyperpronation, medial foot pain, and a limited and painful relevé in dancers.

Where is the navicular bone located?

The navicular bone is one of the seven bones which make up the tarsus of the Ankle and Foot. It is located on the medial aspect of the foot, next to the cuboid bone, anterior to the head of the talus and posterior to the cuneiform bones.

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 treat navicular bone pain?

The following may be used:

1. Immobilization. Placing the foot in a cast or removable walking boot allows the affected area to rest and decreases the inflammation.
2. Ice. To reduce swelling, a bag of ice covered with a thin towel is applied to the affected area. ...
3. Medications. ...
4. Physical therapy. ...
5. Orthotic devices.

Removing an Os Tibiali Externum and fixing a posterior tibial tendon

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How do you tell if you hurt your navicular bone?

Symptoms

• Vague pain to the middle or top of the foot and in the arch of the foot.
• Mild swelling or bruising to the foot, though often not seen.
• Pain with walking, running or jumping. ...
• Tenderness when pushing on the navicular bone.

Can you get arthritis in the navicular bone?

Talonavicular arthritis refers to arthritis in the talonavicular joint, which is comprised of the navicular and talus. This joint is essential to the side to side motion of the foot while walking and is known to be a complex joint.

How common is os tibiale externum?

Schlüsselwörter. The os tibiale externum, also described as accessory navicular bone, accessory (tarsal) scaphoid, os naviculare secundarium or prehallux, is one of the most common accessory bones of the foot. It has a prevalence of 4-21% [1], [4], [5], [6], [7], [8], [10], [12], [16], [17], [24], [25].

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.

Why do I have a bone sticking out the side of my foot?

And why is it called that? When the bone or tissue at the big toe joint moves out of place it forces your big toe to bend toward your other toes, causing a large, often painful lump of bone on the outside of your foot. This lump is called a bunion from the Latin word “bunio” meaning enlargement.

Is navicular bone in ankle?

The navicular bone is a wedge-shaped bone located on the top inner side of the middle of the foot. It serves to connect the ankle bone (talus) to the tarsal bones of the foot.

What connects to navicular?

The tibialis posterior is the only muscle that attaches to the navicular bone. The main portion of the muscle inserts into the tuberosity of the navicular bone.

Is scaphoid the same as navicular?

A navicular fracture (also called a scaphoid fracture) is a break in a small bone on the thumb side of your wrist. Of the eight carpal bones in your wrist, your navicular bone is the most likely one to break.

How long does it take to recover from accessory navicular surgery?

After 6 weeks, most patients can bear their full weight on the foot and start physical therapy, returning to their normal foot function after about 6 months of rehabilitation.

How long does it take for the navicular bone to heal?

It will take about 6 weeks for most people to heal. The goals of treatment are to manage pain and support the bone as it heals. This may include: Medicine to ease pain and swelling.

What does a navicular fracture feel like?

What Are the Symptoms of a Navicular Stress Fracture? Your child will have vague, aching pain along the inner side of the foot near the arch. It may come on slowly over time and get worse during and following physical activity. Sprinting, jumping and pushing-off are movements that aggravate the pain.

Why does my accessory navicular hurt?

The accessory navicular bone is easily felt in the medial arch because it forms a bony prominence there. Pain may occur if the accessory bone is overly large causing this bump on the instep to rub against footwear. This painful condition is called accessory navicular syndrome.

What is Type 2 accessory navicular?

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).

How do you get rid of accessory navicular bone?

For people with accessory navicular bone who experience severe symptoms, surgery may be considered to remove the bony growth. Other treatments may include medications such as nonsteroidal anti-inflammatories (NSAIDs), immobilizing the area with a cast or boot, and physical therapy .

Why does it look like I have 2 ankles?

The presence of an os trigonum in one or both feet is congenital (present at birth). It becomes evident during adolescence when one area of the talus does not fuse with the rest of the bone, creating a small extra bone. Only a small number of people have this extra bone.

Does my horse have navicular?

How is navicular disease diagnosed? ... A history of intermittent low grade or recurrent lameness is suggestive of navicular disease. Affected horses often appear to place the toe down first, as if trying not to put weight on their heels (in contrast to laminitis), and the lameness is worse on the inside leg on a circle.

Do I have an extra bone in my foot?

There are 26 bones in the human foot. Some people have extra bones (accessory ossicles) which are usually congenital (present at birth) but may also be due to previous trauma. These extra bones, which can occur with any bone in the foot, can be painless (asymptomatic) and are only noticed when the foot is x-rayed.

What is the TN joint?

The talonavicular joint is a joint formed by the talus, the bottom half of the ankle joint, and the foot bone immediately in front of it called the navicular. The talonavicular joint is critical in allowing the foot to move inwards and outwards, as well as in a circular motion.

What is OS Trigonum syndrome?

The Os Trigonum Syndrome refers to pain posterior of the ankle and reduced plantarflexion caused by “the nutcracker-phenomenon”. When an os trigonum is present, this accessory ossicle together with surrounding soft tissues can become wedged between the tibia, talus and calcaneus.

What is Osteophytosis?

They're actually smooth projections that extend from your bones, frequently where two bones meet in a joint. The formation of bone spurs, called osteophytosis, is much more common after the age of 60. But younger adults can develop bone spurs, too.