PMC6159278_01
Well-demarcated oval-shaped lesion hypointense to adjacent muscles on axial pre-contrast T1 weighted image (a) and hyperintense on Proton Density Fat Saturated(PDFS ) image (b).
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T1 weighted images (Figure 1a), intermediate signal intensity on T2 weighted images (Figure 2) and heterogeneous high signal intensity on proton density fat-saturated images (Figure 1b). The lesion showed restricted diffusion, appearing as low signal intensity on apparent diffusion coefficient images and as high signal intensity on diffusion-weighted images (Figure 3).
Intermediate signal intensity lesion on sagittal T2 weighted image.
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T1 weighted images (Figure 1a), intermediate signal intensity on T2 weighted images (Figure 2) and heterogeneous high signal intensity on proton density fat-saturated images (Figure 1b). The lesion showed restricted diffusion, appearing as low signal intensity on apparent diffusion coefficient images and as high signal intensity on diffusion-weighted images (Figure 3).
Restricted diffusion elicits diffuse bright signals on diffusion-weighted images (b: 1000 s mm-2), confirming the imaging diagnosis of an epidermoid cyst.
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T1 weighted images (Figure 1a), intermediate signal intensity on T2 weighted images (Figure 2) and heterogeneous high signal intensity on proton density fat-saturated images (Figure 1b). The lesion showed restricted diffusion, appearing as low signal intensity on apparent diffusion coefficient images and as high signal intensity on diffusion-weighted images (Figure 3).
Characteristic thin peripheral post-contrast enhancement of the lesion in the perineum on the right side on axial post-gadolinium T1 weighted Fat Saturated(FS) image.
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Post-contrast images demonstrated subtle enhancement of the lesion wall, with no abnormal internal enhancement (Figure 4).