A massive teratoid cyst of the floor of the mouth

Dermoid cyst is pathologically classified in three types according to cellular components: epidermoid, dermoid, and teratoid. Teratoid cyst contains both epithelial and nonepithelial elements, such as hair follicles, sebaceous and sweat glands, fat, bone, cartilage, muscle, and respiratory tract epithelium. Teratoid cyst rarely arises in the head and neck region. This article describes a massive teratoid cyst arising in the floor of the mouth that included sebaceous glands, sweat glands, and cartilage.