title: Coexistence of struma ovarii with marked ascites and elevated CA-125 levels: case report and literature review.
abstract: BACKGROUND
  Struma ovarii is a rare form of ovarian neoplasm and consists mainly of thyroid tissue. Ascites has been reported in approximately one-third of all the cases. However, the combination of struma ovarii and elevated CA-125 has rarely been reported.
  
  
  METHODS
  We described a case of benign struma ovarii, presenting with the clinical features of ovarian cancer: large complex pelvic mass, gross ascites and markedly elevated serum CA-125 levels. Surgical excision of the ovarian mass was followed by rapid resolution of the ascites and reduction of the serum CA-125 level.
  
  
  CONCLUSIONS
  Struma ovarii can mimic ovarian malignancy clinically, when presented with ascites and an elevated CA-125 level.
authors.affiliation: Department of Obstetrics and Gynaecology, Centro Hospitalar Conde de S Januario, Macao, People's Republic of China. mabelmui@yahoo.com
authors.forename: Mabel Po
authors.initials: MP
authors.lastname: Mui
authors.forename: Kar-Fai
authors.initials: KF
authors.lastname: Tam
authors.forename: Fiona K Y
authors.initials: FK
authors.lastname: Tam
authors.forename: Hextan Y S
authors.initials: HY
authors.lastname: Ngan
mesh_terms: D001201:Ascites / Q000097:blood* / Q000150:complications; D014408:Biomarkers, Tumor / Q000097:blood; D018394:CA-125 Antigen / Q000097:blood*; D005260:Female; D006801:Humans; D008875:Middle Aged; D010051:Ovarian Neoplasms / Q000097:blood / Q000150:complications / Q000473:pathology; D013330:Struma Ovarii / Q000097:blood* / Q000150:complications / Q000473:pathology
chemical_list: D014408:Biomarkers, Tumor; D018394:CA-125 Antigen