chorioangioma
noun
cho·rio·an·gi·o·ma
-ˌan-jē-ˈō-mə 
plural chorioangiomas also chorioangiomata
-mət-ə
: a benign vascular tumor of the chorion
Chorioangiomas occur in up to 1 percent of pregnancies, but those associated with nonimmune fetal hydrops are usually more than 5 cm in diameter and should have been visible on prenatal ultrasonograms or in the placenta at delivery.—
Linda J. Heffner et al., The New England Journal of Medicine
Linda J. Heffner et al., The New England Journal of MedicineCite this Entry
“Chorioangioma.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/chorioangioma. Accessed 31 Oct. 2025.
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