Right MCA hyperacute infarct
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Loss of grey-white matter differentiation and hypoattenuation at right insular cortex and lentiform nucleus.
Features are consistent with right MCA territory non-haemorrhagic hyperacute infarct.
The loss of the insular ribbon sign refers to a loss of definition of the gray-white interface in the lateral margin of the insular cortex ("insular ribbon") and is considered an early CT sign of MCA infarction.