What is an os odontoideum?

What is an os odontoideum?

Os odontoideum is a rare condition of the cervical spine. It occurs when a separation occurs at the top of the spine. The tip of the second cervical vertebra is called the odontoid. In os odontoideum, the tip of the odontoid becomes separated from the remainder of the vertebra, which can lead to spinal instability.

How rare is os odontoideum?

The estimated frequency of posttraumatic os odontoideum in combination with atlantoaxial joint dislocation is less than 2% among upper cervical spine injuries. The age at diagnosis varies significantly from the first to the sixth decade of life.

What disease causes no neck?

Klippel-Feil Syndrome (KFS) is a congenital bone condition in which at least 2 cervical vertebrae remain fused and immobile. Some common signs may include a visibly short neck and low hairline behind the head.

What is a type 2 dens fracture?

A type II odontoid fracture is a break that occurs through a specific part of C2, the second bone in the neck. Bones of the spine are called vertebrae. The bone involved in odontoid fracture is the second vertebra, C2, high up in the neck.

How is hangman’s fracture treated?

This type of treatment involves using a hard neck collar, called a cervical brace, or a halo vest. A halo vest is a type of brace that is used to keep you from moving your neck so that your fracture can heal. It includes a ring around your head held in place by pins attached to your skull.

What is the clinical significance of the hangman fracture which specific vertebrae is effected?

The fracture is in most cases lethal. The fracture is caused by an extreme force on the upper vertebrae and especially on the dens of the axis. The fracture causes damage to the spinal cord which leads to paralysis of respiratory muscles and most often death.

How is KFS diagnosed?

Klippel Feil syndrome (KFS) is typically diagnosed based on a clinical examination, symptoms and imaging studies ( X-rays , MRI or CT scan ). Additional studies may be necessary to look at other parts of the skeleton and other body systems.

Are neck issues hereditary?

Many cervical spine conditions — both common and rare — have a genetic component. Genetic conditions can be caused by inheritance (passed from parent to child), disrupted or abnormal development in utero, or unknown factors. Genetic conditions that affect the cervical spine vary widely.