Ectopical decidua formation in the ovary (so-called deciduoma).
D002585:Cesarean Section; D003656:Decidua / Q000473:pathology*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D010049:Ovarian Diseases / Q000473:pathology*; D010051:Ovarian Neoplasms / Q000175:diagnosis; D011247:Pregnancy; D011248:Pregnancy Complications / Q000473:pathology*; D013245:Sterilization, Reproductive