1. Intraoperative tumors with a firm consistency.
Intraoperative tumors with a firm consistency. Upper: Left cerebellopontine angle meningioma in a 51-year-old man. A, Axial postcontrast T1-weighted MR imaging shows a strongly enhanced tumor (arrow). B, Axial T2-weighted MR imaging shows an isointense tumor (arrow). C, Wave MRE image (arrow). D, Elastogram shows tumor shear stiffness (arrow) (meanSS = 4.4 kPa; maxSS = 7.2 kPa). The intraoperative tumor consistency was mostly firm, requiring ultrasonic aspiration at a high setting (scale 4). E, Histopathologic examination of the resected tumor indicates fibrous meningioma (hematoxylin-eosin stain; scale bar, 200 μm). Lower: Nonfunctioning recurrent pituitary adenoma in a 63-year-old woman. F, Axial postcontrast T1-weighted MR imaging shows a strongly enhanced tumor (arrow). G, Axial T2-weighted MR imaging shows an isointense tumor (arrow). H, Wave MRE image (arrow). I, Elastogram shows tumor shear stiffness (arrow) (meanSS = 1.6 kPa; maxSS = 2.1 kPa). The intraoperative tumor consistency was mostly firm, requiring ultrasonic aspiration at a high setting (scale 4). J, Histopathologic examination of the resected tumor indicates diffuse adenoma with fibrosis (hematoxylin-eosin stain; scale bar, 200 μm).
N. Sakai et al. AJNR Am J Neuroradiol 2016;37:
©2016 by American Society of Neuroradiology