<prompt> Answer this question truthfullyWhat is the hormone that is found to be high in PSTT Placental Site Trophoblastic Tumor?  <response>: <reason> Human placental lactogen is the hormone that is found to be high in PSTT Placental Site Trophoblastic Tumor. PSTT is a rare type of gestational trophoblastic disease that arises from the placental site and can occur after a normal pregnancy, miscarriage, or abortion. Human placental lactogen is a hormone that is produced by the placenta during pregnancy and plays a role in regulating maternal metabolism and fetal growth. In PSTT, the tumor cells produce high levels of human placental lactogen, which can be detected in the blood and used as a marker for diagnosis and monitoring of the disease. Treatment for PSTT typically involves surgical removal of the tumor, followed by chemotherapy in some cases. 