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MRI performed in a patient with sudden-onset headache and loss of vision reveals subacute phase haemorrhagic infarction within a pituitary macroadenoma. The intrasellar cystic component of adenoma appears slightly hyperintense on coronal T2 weighted (a) and unenhanced sagittal T1 weighted images (b). Coronal T2 weighted images show impression of optic chiasm.
