"Mature Teratoma" is a medical term that describes a type of tumor that contains diverse types of tissues, which are different from the organ where it originates. It is also called a "dermoid cyst" or "benign cystic teratoma." However, there are other synonyms for this term that include mature cystic teratoma, mature dermoid, dermoid teratoma, benign teratoma, and mature teratomatous cyst. These synonyms can assist medical professionals to diagnose and treat the condition accurately. It is essential to identify the type of tumor early for effective treatment. Although it is benign, mature teratoma can cause complications if left untreated.