What is extradural defect?

Extradural defects are openings in the skull that do not involve the overlying skin. They are usually caused by trauma, such as a head injury, or by a surgical procedure, such as a craniotomy. Extradural defects can allow brain tissue to herniate through the opening, which can lead to serious complications, such as brain damage or death.

There are two main types of extradural defects:

* Linear extradural defects are narrow, slit-like openings in the skull. They are usually caused by a sharp object, such as a knife or a piece of glass.

* Depressed extradural defects are larger, bowl-shaped openings in the skull. They are usually caused by a blunt object, such as a hammer or a baseball bat.

Extradural defects can be diagnosed using a variety of imaging tests, such as a CT scan or an MRI. Treatment for extradural defects typically involves surgery to close the opening in the skull.