ovarian benign neoplasm serous or mucinous cystadenoma of childhood https://www.malacards.org/card/cystadenoma_of_childhood UMLS:C5679785 Serous or mucinous cystadenoma of childhood is a benign epithelial ovarian tumor characterized by a usually unilateral, cystic, unilocular or multilocular lesion with a thin wall or septa and no intracystic solid portion on imaging. It often presents with abdominal pain or an asymptomatic abdominal mass and can be associated with ovarian torsion or malignant transformation. Orphanet:206470 MEDGEN:1803886 GARD:0020346 MONDO:0016092