epithelioid

Placental site trophoblastic tumours (PSTTs) and epithelioid trophoblastic tumours (ETTs) are cancers that happen after pregnancy. They are extremely rare and are slow growing.  What are placental site trophoblastic tumours and epithelioid trophoblastic tumours? These tumours are part of a group of conditions called gestational trophoblastic disease (GTD). GTD is the name for abnormal cells or tumours that grow from the tissue that forms in the womb during pregnancy. Less than 1 in 100 (less than 1%) of GTDs are placental site trophoblastic tumours or epithelioid trophoblastic tumours. In PSTT and ETT the tumour develops from the cells that grow