teratomas

Definition: Teratomas are neoplasms comprised of mixed elements derived from the three germ cell layers.

A teratoma is generally defined as a tumor arising from pluripotent cells, and it is precisely the heterogeneity of tissues present in such a tumor that best characterizes it; it is also commonly accepted that a teratoma must contain derivatives of more than one blastodermic layer, according
to traditional concepts of embryonic ontogenesis.

Microscopical types

 mature teratoma

• ovarian dermoid cysts
   immature teratoma

According to age

 fetal teratoma
 neonatal teratoma

According to the localization

 gonadal teratoma

• ovarian teratoma
• testicular teratoma

 extragonadal teratoma

• cervical teratoma
• mediastinal teratoma
• pericardial teratoma
• retroperitoneal teratomas
• sacrococcygeal teratoma

Variants

• with intratumal Wilms tumor (15105660)
• with intratumal embryonal rhabdomyosarcoma (15105660)

Videos

 mature ovarian teratoma (by Washington Deceit)

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See also

 Tumors

• germ cell tumors (GCTs)
  • teratomas