Figure 1: Brain magnetic resonance imaging demonstrating enlarging pituitary mass. (a) T1-weighted MRI demonstrating enlarged pituitary gland containing a hypovascular 10.5 × 7.5 mm mass lesion with thickening of the pituitary infundibulum without intracranial hemorrhage or extra-axial fluid collection. (b) Imaging one month later with T1-weighted MRI demonstrating a 22.0 × 12.0 mm bilobed mass with 8 mm suprasellar extension exerting mass effect on overlying optic chiasm.