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Answers to Illuminations questions
  1. Helen Williams
  1. Correspondence to Dr Helen Williams, Radiology Department, Birmingham Children's Hospital, Birmingham B4 6NH, UK; helen.williams{at}

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This patient has an acute, non-haemorrhagic right middle cerebral territory infarct. There was involvement of the right precentral and postcentral gyri (motor and sensory areas) on other images. The axial T2-weighted image (figure 1) demonstrates high signal in swollen/oedematous ischaemic cortex with effacement of the sulci. There is also restricted diffusion in the affected area, with corresponding high/increased signal (bright) on DWI (figure 2), and low signal (dark) on the apparent diffusion coefficient (ADC) map (figure 3). …

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  • Competing interests None declared.

  • Provenance and peer review Commissioned; internally peer reviewed.