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A 48 year-old woman developed headaches and difficulty with her vision. On examination, she had a bi-temporal field deficit.
Sagittal MRIs. (Left) T1-weighed image; (Right) T1-weighted with gadolinium. Note the large enhancing mass which fills the sella. This is the typical appearance of a small pituitary macroadenoma that is growing beyond the sella and starting to compress the optic chiasm above. Macroadenoma was typically designated as tumors larger than 10 mm.
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