Fig. 1.

(A) Clinical variability of epidermoid cysts. Puncta of epidermoid cysts (arrows) that dark color keratin plug overlying cyst cavity tether the cyst to the overlying epidermis. (B) Intraoperative view and surgical specimen. (C) Photograph of the sectioned surgical specimen shows masses with a fibrous capsule that was composed of a laminated white-yellow paste-like material, typical of keratin. (D) Photomicrograph of pathology shows a solitary epidermoid cyst is appreciated in the dermis. Note the thin squamous epithelium image (arrow) and abundant keratin contents image (arrowhead); Original magnification, ×10; Hematoxylin and Eosin staining. (E) Photomicrograph of pathology shows the contents of the epidermoid cyst consist of laminated orthokeratotic material. Cyst wall lined by keratinizing stratified squamous epithelium image similar to the epidermis (arrow); Original magnification, ×100; Hematoxylin and Eosin staining. (F) Schematic illustration of a segment of skin with epidermoid cyst (asterisk). Note the epidermoid cyst that does bulging skin surface (arrow) (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article).