Gestational trophoblastic diseases present a risk of malignant, invasive and metastatic progression, hence the advantage of rigorous biological monitoring after any molar evacuation, with the aim of detecting any malignancy early, and consequently reducing the mortality of these diseases. The therapeutic approach y is based on chemotherapy, but embolization and hysterectomy must be taken on consideration especially in the haemorrhagic forms of the disease.

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Placental chorioangioma is the most frequent benign vascular placental tumor, and the prenatal diagnosis can be made byUltrasound with color flow and pulsed doppler, which can be very helpful for the follow-up and the prognosis of this tumourassociated with severe maternal and fetal consequences.