extraaxial

ex·tra·ax·i·al

(eks'tră-aks'ē-ăl),
Off the axis; applied to intracranial lesions that do not arise from the brain itself.

extraaxial

adjective Outside the CNS

ex·tra·ax·i·al

(eks'tră-aks'ē-ăl)
Off the axis; applied to intracranial lesions that do not arise from the brain itself.
References in periodicals archive ?
It typically affects the base of skull, the vertebral bodies, and the sacrococcygeal bone, but may be rarely seen in the extraaxial skeleton, such as intervertebral discs and presacral soft tissue.
MRI revealed an intraspinal, intradural, extraaxial mass at T8-T9, with a polar cyst.
The CT scan finding shows that 50% cases had intraaxial lesions and 40% had extraaxial lesions, while 10% had both (Figure 1).
Arachnoid cysts are extraaxial and displace the brain cortex from the adjacent skull [4].
These frequently arise in an intradural extraaxial location anterior to the cervical-thoracic spinal cord while intracranial cysts have a tendency to be infratentorial.
Axial and sagittal T1WI (A and B) and axial and coronal T2WI (C and D) show a large extraaxial lobulated smooth marginated high signal intensity pattern cystic lesion in the suprasellar region with its regional extension.
Brain abscess complications include local mass effect with intracranial herniation, hydrocephalus, meningitis, extra-axial fluid collection, sinus thrombosis, infarct, cranial nerve involvement, ventriculitis, and extraaxial fluid collections (empyema and hygroma).
Imaging features of extraaxial musculoskeletal tuberculosis.
Foi realizada tomografia computadorizada que evidenciou a presenca de massa extraaxial em cortex frontal direito de aproximadamente dois centimetros de diametro, com areas de calcificacao, efeito de massa, desvio da fissura longitudinal a direita, com realce apos aplicacao do meio de contraste (Figura 1).
Se presenta a nivel supratentorial una gran masa tumoral de aspecto solido, extraaxial, localizada en fosa temporal derecha, que condiciona importante efecto de masa y edema perilesional que se extiende por el centro semioval del lado derecho comprimiendo el ventriculo lateral derecho y desplazando la linea media condicionando a su vez herniacion uncal derecha.
En la paralisis facial, sea idiopatica o secundaria al sindrome de Ramsay-Hunt, tienen valor pronostico y permiten saber con mas confianza si la lesion es intraaxial o extraaxial tanto la medicion de las latencias y amplitudes obtenidas por estimulacion simple, como la relacion que resulta de dividir la latencia de R1 por la del potencial de accion motor obtenido por estimulacion directa del nervio facial y registrado en el musculo orbicular de los ojos.