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.

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