Specific brain disorders

Specific brain disorders

Imaging techniques:

1-Skull x-ray
2-CT- scan and MRI with and without contrast
3MRI
4-Angiography used for special circumstances as menengiomas

Cerebral lesion appearance
Intracranial calcification
Seller erosion
Sclerosis
Abnormal vascular marking
Pineal displacement

Calcification

Tumours: meningiomas
Infection: tuberculoma, toxoplasmosis
Metabolic: basal ganglia
Vascular: aneurysm , hematoma
Miscellaneous ;neurofibromatosis, Sturge Weber syndrome.

Erosion

Extracranial : dermoid .

Bony lesion as multiple myeloma which appears as multiple small rounded and clear cut defect.
Metastasis; extremely common and often multiple have characteristic mouth eaten appearance.

Intracranial with bony erosion
Pituitary adenoma ,expand and erode pituitary fosse,
Acoustic neuroma lead to erosion of inner meat us
Non tumerous erosion
Infection as osteomylitis .
Radiation .

sclerosis
Generalize increase bone density
Paget disease ; it may take form of multiple patchy areas of increase density

Localized
the commonest cause of bone sclerosis is hyperostosis frontalis intarna ,a condition of no clinical significance, in which there s irregular thickening of inner table of the skull in frontal region sparing midline
Meningioma
Osteosarcoma