What is chorioangioma of the placenta?
Placental chorioangioma is the most common benign non-trophoblastic tumor of the placenta. It is derived from primitive chorionic mesenchyme and is typically vascular. Placenta chorioangiomas occur in approximately 1% of pregnancies. Most placental chorioangiomas are small and are not clinically important.
What is the most common lesion of placenta?
Placental chorioangiomas are benign vascular tumours and are the most common placental tumours, with a prevalence of 1%. Large placental chorioangiomas are rare and may lead to pregnancy complications and poor perinatal outcomes.
How is the tumor of placenta diagnosed?
Diagnosis. Larger chorioangiomas may be diagnosed during a routine prenatal ultrasound, often in the second trimester. Small chorioangiomas that are not causing symptoms often go undetected. In some cases, a small chorioangioma isn’t discovered until after birth, when the placenta is expelled and evaluated.
How does chorioangioma of placenta cause Polyhydramnios?
The large surface area of the enlarged vessels of the angioma may also predispose to the increased transudation. Polyhydramnios also can be explained by the partial placental insufficiency caused by shunting of the fetal blood into the vessels of the chorioangioma.
What is placenta pathology?
Placental pathology involves insults in either the maternal or fetal vascular compartments or to the placenta itself. The clinical effects of these pathologies are, for a large part, dependent on placental reserve.
What does a mass on the placenta mean?
Placental mass protruding into the amniotic cavity. Chorioangioma is a benign vascular malformation of the placenta and represents the most common primary tumour of the placenta. Presence of this vascular malformation can result in significant maternal and fetal morbidity depending on the size of the lesion.
Can chorioangioma cause Polyhydramnios?
Polyhydramnios is a frequent complication of chorioangioma. One possible explanation of the polyhydramnios noted in this case was the close proximity of the tumour to the umbilical cord. There is potential that the chorioangioma compressed the umbilical vessels leading to fluid accumulation.
What is Chorangiosis?
Chorangiosis is a vascular change involving the terminal chorionic villi in the placenta. It results from longstanding, low-grade hypoxia in the placental tissue, and is associated with such conditions as intrauterine growth restriction (IUGR), diabetes, and gestational hypertension in pregnancy.
What is placental pathology report?
A placental examination permits the clinician to study the intrauterine environment of the fetus and some of the fetal responses to disease.
What do obstetricians know about placenta pathology?
The criteria for submission of placentas for pathologic examination include maternal, neonatal, and placental indications. A careful, systematic gross examination of the placenta, including the membranes, umbilical cord, fetal surface, and maternal surface, is key.
What is a placenta lesion?
Placental lesions were classified as arising from placental vascular (maternal or fetal side), immunoinflammatory or other placental processes17. Maternal and fetal stromal–vascular findings were classified as developmental, malperfusion or loss-of-integrity lesions.
What is placenta cyst?
Definition: Placental cysts are sonolucent areas that can be detected antenatally by ultrasound; they have a round or oval cavity, usually isolated from the placental circulation and contain a gelatinous fluid.