Dermoid cyst

Developmental (inclusion) dermoid cyst

• External angular dermoid lies at the junction of outer and upper margins of the orbit
• For plastics to excise

Traumatic (implantation) dermoid cyst

• Caused by repetitive trauma e.g. tailors, hairdressers
• Often seen on fingers
• Lined by squamous epithelium, containing sebum - the epithelial cells are implanted by repeated trauma
• Deroof the cyst and enucleate its contents with curette
• Can be left alone if asymptomatic