There is an area of low density in the region of the left frontal lobe. This is rather asymmetric when compared with the right side.
Intravenous contrast enhancement should be given in view of the history of breast carcinoma.
Following IV contrast (Fig. 5.27) there is a 1 cm diameter area of avid contrast enhancement. This is a cerebral metastasis and the low density surrounding it is white matter oedema. Situations requiring IV contrast include:
■ suspected malignancy primary or secondary,
■ inflammatory conditions such as abscess,
■ vascular lesions such as arteriovenous malformations,
■ venous sinus thrombosis (to demonstrate failure in opacification? and filling defects in the sinus).
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