Epidermal Inclusion Cyst

**Semantic type:** Finding

**Definition:** The most common type of cutaneous cyst. It results from the proliferation of epidermal cells in a circumscribed space within the dermis. It is usually asymptomatic and presents as a firm, round nodule.

**Synonyms:** - Epidermal Cyst - Epidermoid Cyst - Epithelial Cyst - Follicular Infundibular Cyst - Horn Cyst - Inclusion Cyst - Infundibular Cyst - Keratin Cyst - Keratinizing Cyst - Keratinous Cyst - SQUAMOUS CYST