teratoma
Teratomas are germ cell tumors that arise from ectopic pluripotent stem cells that fail to migrate from yolk sac endoderm to the urogenital ridge during embryogenesis. By definition, they contain elements from all three embryological layers: endoderm, mesoderm and ectoderm although frequently, elements from only two layers are evident.
Pathology
Teratomas range from benign, mature, well-differentiated cystic lesions to immature, poorly differentiated lesions with solid components and malignant transformation. As a result they can contain a large variety of tissue types including. On occasion, mature teratomas contain elements that undergo malignant transformation (most commonly squamous components).
- fat
- cystic spaces due to mucous production or other exocrine products
- soft-tissue from any part of the body
- calcification including teeth
Location
They are found in a variety of locations, including:
- ovary: see ovarian teratoma (also known as ovarian dermoid cyst)
- testis: see testicular teratoma
- mediastinum: see mediastinal teratoma
- account for 27% of all teratomas in adults
- account for 4-13% of all teratomas in children
- intracranial: see intracranial teratoma
- sacrococcygeal region: see sacrococcygeal teratoma
History and etymology
The word teratoma is derived from the word “teratos” in Greek which means monster.
Siehe auch:
- Teratom des Ovars
- Keimzelltumor
- Steißbeinteratom
- intrakraniale Teratome
- mediastinales Teratom
- Teratom des Hodens
und weiter:
- Pinealiszyste
- genitourinary curriculum
- Hypophysenadenom
- Rathke Zyste
- Seminom
- ektope Neurohypophyse
- Tumoren des vorderen oberen Mediastinums
- Pineoblastom
- suprasellar cistern lipoma
- Tumoren der hinteren Schädelgrube
- Pineozytom
- Krebs
- Tumoren der Sellaregion
- cystic teratoma
- anterosuperior mediastinal mass (mnemonic)
- pituitary region mass with intrinsic high T1 signal
- CNS germinoma
- Thymuslipom
- teratoma suprasellar
- suprasellar / hypothalamic lesions
- caudal dysplasia sequence
- classification of germ cell tumours
- non-seminomatous germ cell tumours
- Seminom des Hodens
- nasopharyngeales Teratom
- growing teratoma syndrome
- haemorrhagic metastases (mnemonic)
- germ cell tumours (mnemonic)
- Teratom der Glandula parotis
- germ cell tumour classification
- mediastinale Keimzelltumoren
- mesenteriales Teratom
- nichtseminomatöser Keimzelltumor
- Apoplex der Hypophyse
