[Placental-site trophoblastic tumour].

Placental-site trophoblastic tumour (PSTT) is the rarest type of gestational trophoblastic tumours. It typically occurs in the reproductive age arising weeks to years after any kind of pregnancy. Although the pathohistology is benign, it may resemble a malignant tumour with metastases, relapse or even fatal outcome. Unlike other types of gestational tumours PSTT is relatively unresponsive to chemotherapy. Hysterectomy is the best treatment.