deciduoma

noun
de·cid·u·oma | \-ˈwō-mə \
plural deciduomata\-mət-ə \ also deciduomas

Medical Definition of deciduoma 

1 : a mass of tissue formed in the uterus following pregnancy that contains remnants of chorionic or decidual tissue

2 : decidual tissue induced in the uterus (as by trauma) in the absence of pregnancy

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