A teratoma is a type of tumor that can contain tissues derived from multiple germ cell layers, such as hair, teeth, bone, and muscle. It is typically congenital, meaning it is present at birth, and usually occurs in the ovaries, testes, or sacrococcygeal region (at the base of the spine). Teratomas are considered to be rare and can be either benign (non-cancerous) or malignant (cancerous).
They are derived from pluripotent cells, which have the ability to develop into various types of tissues. The term "teratoma" comes from the Greek words "teras" meaning monster, and "onkoma" meaning swelling or tumor, refecting the tumor's diverse and often bizarre tissue components.
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