MRI findings of subcutaneous epidermal cysts: emphasis on the presence of rupture.

Hong, Sung Hwan; Chung, Hye Won; Choi, Ja-Young; Koh, Young Hwan; Choi, Jung-Ah; Kang, Heung Sik · AJR Am J Roentgenol · 2006

case_series · Level IV

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Abstract

Our aim was to describe the MRI findings of subcutaneous epidermal cysts with an emphasis on determining the presence of rupture. Epidermal cysts show a fluidlike signal with variable low-signal components on T2-weighted images and peripheral rim enhancement on gadolinium-enhanced images. Most ruptured cysts have septa, show thick and irregular rim enhancement, and are accompanied by a fuzzy enhancement in surrounding subcutaneous tissues. These imaging features of a ruptured epidermal cyst simulate a mass of infectious or neoplastic origin.

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