Hyperdense MCA sign
Acute dysphasia and facial droop.
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Non-contrast CT demonstrates a hyperdense MCA artery, extending into the sylvian fissure and seen as a hyperdense dot on axial imaging (dot sign). No evidence of a definite established infarct although patchy regions of the insula cortex appear ill-defined.
This case demonstrates the typical appearance of a hyperdense MCA sign, not in the M1 segment, but more distally in M2 and M3 branches. It thus appears as a dot in axial images.