Figure 12.

Pituitary macroadenoma invading left cavernous sinus (A, B) Preoperative coronal contrast-enhanced T1 MRI sequence (C, D) Postoperative coronal contrast-enhanced T1 MRI sequence, small tumor residuum was intentionally left in the left cavernous sinus (E) Pre-resectional 2D IOUS image using flexible mini-probe, note distinct depiction of the tumor tissue as well as visualization of upper segments of carotid arteries by power-Doppler mode (F) Intraoperative 2D IOUS image after partial tumor resection. Note partial decompression of the third ventricle with depicted interthalamic adhesion (arrow) (G) 2D IOUS image after tumor resection, note pituitary stalk is distinctly visible (arrow) as well as the floor of the 3rd ventricle (arrowhead). 2D, two-dimensional; MRI, magnetic resonance imaging; IOUS, intraoperative ultrasound; V, lateral ventricle; T, tumor.