Figure 15.

Giant invasive macroadenoma. (A) Sagittal noncontrast T1W, (B) coronal postcontrast CISS, and (C) sagittal postcontrast T1W MR images show tumor invading the clivus, cavernous sinuses, and posterior sinonasal cavity. Probably hemorrhagic T1 hyperintense component of the tumor extends into the prepontine cistern and compresses the pons (white arrow) with mass effect on the optic chiasm and third ventricle. (D) Coronal CTA shows encasement of the left greater-than-right cavernous internal carotid artery without significant vascular narrowing (blue arrows).