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  • Courtesy of Steven A. Newman, MD
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    Various tumors may have specific sequence findings. This patient had a large frontal tumor invading the orbit. A, Sagittal T1-weighted sequence shows the tumor to be heterogeneous but mostly hypointense to gray matter. B, Axial gadolinium-enhanced T1-weighted image demonstrates minimal rim enhancement. C, On the proton density image, the signal intensity becomes brighter, being isointense with gray matter and brighter than white matter. D, On T2-weighted images, the lesion becomes extremely bright. These findings are characteristic of an epidermoid.