malignant struma ovarii https://www.malacards.org/card/malignant_struma_ovarii struma ovarii, malignant (morphologic abnormality) NCIT:C4291 ICDO:9090/3 struma ovarii, malignant An ovarian mature teratoma characterized by the presence of aberrant thyroid tissue with morphologic changes identical to thyroid carcinoma. Patients may present with abdominal mass and unusual symptoms due to thyrotoxicosis, or with Meigs syndrome (ascites and pleural effusion). MONDO:0003332 MEDGEN:137777 GARD:0023454 UMLS:C0334525 DOID:5208 teratoma with malignant transformation struma ovarii immature ovarian teratoma