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Overview of epidermoid cyst

2019; Elsevier BV; Volume: 6; Linguagem: Inglês

10.1016/j.ejro.2019.08.003

2352-0477

Van Trung Hoang, Cong Thao Trinh, Canh Hùng Nguyen, Vichit Chansomphou, Vinay Chansomphou, Thi Tinh Tam Tran,

Nonmelanoma Skin Cancer Studies

Epidermoid cysts are slow-growing, painless masses that elevate the skin and often have a central punctum that represents the plugged orifice of the pilosebaceous follicle. On ultrasound, they have a round to oval structure, well-circumscribed, avascular mass located in subcutaneous tissue along with phenomena of dorsal acoustic amplification and lateral shadowing. On MRI, they have slightly hypointense signal intensity on T1-weighted and intermediate to high signal on T2-weighted. Restricted diffusion is typical of epidermoid cysts. These signs are useful in the differentiation of epidermal cysts from neoplastic lesions. They need early treatment as they can cause cosmetic and functional impairment.