Fig. (1) A 40-year-old male with a large-size epidermal cyst in his buttock. The MRI demonstrates a well-circumscribed, oval-shaped lesion with hyperintense signal relative to the muscle on a T1-weighted image (A) and a hypointense signal relative to adipose tissue on a T2-weighted image (B). Keratinized material with a low signal intensity on T1- and T2-weighted images is observed as intracystic diffuse foci (a sign of intracyst debris: yellow arrow) and at the periphery close to the wall (sign of a peripheral lining: white arrow) (A and B).

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