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An ectopic thyroid is a condition in which some of a person's thyroid tissues or the entire gland fails to form in the right place...
Epithelioid trophoblastic tumor (ETT) is an extremely rare type of gestational trophoblastic disease that can be hard to diagnose. ETT used to be called atypical choriocarcinoma because the cells look like choriocarcinoma cells under the microscope, but it is now thought to be a separate disease.