Young overseas worker, with altered cognition.The patient was apyrexic and been 'off colour' for a couple of weeks.
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Large thick walled ring enhancing right frontal lobe mass with avid internal diffusion restriction and marked perilesional oedema, with resultant effacement and displacement of the lateral ventricle.
2 case questions available
Cerebral abscess is one of a number of differential for a ring enhancing lesion in the brain.
The avid diffusion restriction makes an abscess highly likely, despite this patient had no fever or raised WCC. The immune response may be suppressed.
MR spectroscopy could have been performed to add further weight to the diagnosis.
Neurosurgery was performed. The final microbiological analysis identified the causative organism as Staphylococcus aureus.