These postcontrast axial CT images of 3 different patients demonstrate the variable appearances of the SCSC with respect to their texture and attenuation.

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Presentation transcript:

These postcontrast axial CT images of 3 different patients demonstrate the variable appearances of the SCSC with respect to their texture and attenuation. These postcontrast axial CT images of 3 different patients demonstrate the variable appearances of the SCSC with respect to their texture and attenuation. All of them are well-defined and round to oval with anterior (A) or anterolateral (B and C) displacement of the vessels in the carotid sheath. There is no separation of the IJV and ICA. A, The schwannoma is homogeneously hypoattenuated to the skeletal muscle, with almost no enhancement. B, The schwannoma is predominantly isoattenuated with enhancement similar to that of the skeletal muscle. Internal heterogeneity is noted as an irregular poorly enhancing hypoattenuated area in its anteromedial quadrant. C, The schwannoma shows marked internal heterogeneity. Central areas are intensely enhancing, while the rest of the tumor is moderately or poorly enhancing. G. Anil, and T.Y. Tan AJNR Am J Neuroradiol 2010;31:1408-1412 ©2010 by American Society of Neuroradiology