Epidermoid cysts are common, benign skin growths that can be managed effectively with proper medical care. Understanding their causes, symptoms, and treatment options is crucial for anyone affected by them. An epidermoid cyst is the most common type of skin cyst . Learn about what they look like and when you should get them removed. An epidermoid cyst is a benign cyst usually found on the skin, made of squamous epithelium and keratin. Learn about its signs, symptoms, diagnosis, treatment, terminology and images. In addition to occurring in many visceral organs, epidermoid cysts may also appear on the skin and mucous membranes. An epidermoid cyst is a common type of cutaneous cyst with an epidermis-like epithelial lining (wall). The lining of the cyst produces keratin. The term sebaceous cyst , which has formerly been used as a synonym for epidermoid cyst , is inappropriate because of the absence of sebaceous glands within the cyst lining. It is the result of the proliferation of surface epidermoid ...