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Picture of Epidermal Inclusion Cyst (EIC)

Picture of Epidermal Inclusion Cyst (EIC).

An epidermal inclusion cyst (EIC) is a benign cystic growth containing lipids (fats) and keratin. It arises from a ruptured sebaceous gland that is connected to a hair follicle (pilosebaceous gland). EICs are the most common type of skin cysts. A foul odor may be present if these cysts are ruptured or removed.

Text Source: Color Atlas of Cosmetic Dermatology Marc R. Avram, Sandy Tsao, Zeina Tannous, Mathew M. Avram Copyright 2011 by The McGraw-Hill Companies, Inc. All rights reserved.

Text Reference: "Minimal Excision Technique for Epidermoid (Sebaceous) Cyst." American Family Physician.