A Rare Case of Epidermoid Cyst at Suprasternal Notch in an Adult.

Dermoid cysts are benign entities, characterized histologically as- if it is lined by squamous epithelium, it is known as epidermoid cyst, if it contains skin adnexa, it is called true dermoid and if it contains tissue of all three germ layers like muscle, teeth, bone, cartilage it is called teratoid cyst. Prevalence is 7% and 1.6 % in head & neck and oral cavity respectively. According to literature the term dermoid cyst can be used interchangeably for any of the three histologically distinct entities. They occur at areas of embryonic fusion. Dermoid cyst are classified into four categories based on location 1. Periorbital 2. Nasal 3. Submental 4. Lower neck region.[1],[2]