Difference between PSTT ( Placental site trophoblastic tumor) and Choriocarcinoma- Vascular invasion Difference between PSTT ( Placental site trophoblastic tumor) and Choriocarcinoma- Vascular invasion Difference between PSTT ( Placental site trophoblastic tumor) and Choriocarcinoma- Vascular invasion.🎯📟PSTT – invasion is periphery to lumen.🎯📟Choriocarcinoma- lumen to periphery. Share this:FacebookTelegramWhatsAppMoreLinkedInTwitterLike this:Like Loading...