Haemorrhagic pituitary macroadenoma
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MRI of the pituitary demonstrates a large mass expanding the sella and extending into the suprasellar cistern compressing the optic chiasm. Within the right side of the mass a region of intrinsic high T1 and T2 signal is demonstrated (high T1 signal material is seen layering posteriorly) consistent with subacute blood products (extracellular met-haemoglobin).
This case illustrates appearances consistent with haemorrhage into a pituitary macroadenoma. It would be interesting to know if the patient presented with sudden headache / visual loss to suggest classic pituitary apoplexy.