Epidermoid Cyst

Diagnosis: Epidermoid Cyst

Multiple epidermoid cysts occur in areas where sebaceous glands are large and numerous, such as on the labia.

Clinical Presentation

Multiple epidermoid cysts occur in areas where sebaceous glands are large and numerous, such as on the labia.

Clinical History

Submitted by Alaa Saad. Originally posted October 18, 2010.

Treatment

See case discussion.

Differential Diagnosis

• Pilar (trichilemmal) cyst • Lipoma • Dermoid cyst • Abscess • Dermatofibroma • Pilomatricoma

Key Learnings

• Most common cutaneous cyst — lined by stratified squamous epithelium with granular layer • Central punctum is a helpful clinical clue • Rupture → intense foreign body reaction — NOT infection in most cases • Multiple epidermoid cysts: consider Gardner syndrome (APC mutation) • Pilar cyst: scalp predilection, lacks granular layer

Tags: epidermoid, cyst, alaa saad