Successful Management of Giant Placental Chorangioma by Microcoil Embolization.

Fetal loss appears to be primarily from shunt physiology and high-output failure, compounded by the secondary effect of severe anemia from microangiopathic hemolysis and red cell sequestration within the tumor. 4 A third mechanism may diminish oxygen and nutrient delivery to the developing fetus due to preferential blood flow into the low-pressure vascular circuit of the tumor and away from the intervillous space (steal phenomenon). 2 Finally, there is likely to be significant competitive substrate consumption by the enlarging tumor.

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