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FIG 1. The case of a 57-year-old man who presented with decreased vision in his right eye.
A, Nonenhanced CT scan shows a homogeneous, nonhemorrhagic, hyperattenuated intrasellar mass.
B, Coronal spin-echo T1-weighted MR image (500/20 [TR/TE]) shows a large homogeneous intrasellar mass that compresses the optic chiasm, consistent with a nonhemorrhagic macroadenoma.
C, Coronal spin-echo T1-weighted MR image (500/20) shows no change after the administration of contrast medium (0.05 mmol/kg).
D, Tensor diffusion-weighted MR image (b = 1000 mm2/s) shows markedly increased signal intensity (arrow) within the pituitary mass, compared with that in normal gray and white matter.
E, ADC map shows markedly decreased signal intensity within the pituitary mass; mean ADC was 0.49 (10–3 mm2/s).
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