title: Yolk sac tumor of the ovary: CT findings.
abstract: BACKGROUND
  The purpose of this study was to evaluate computed tomographic (CT) findings of pathologically proven yolk sac tumors of the ovary.
  
  
  METHODS
  Two radiologists retrospectively evaluated CT findings of 10 yolk sac tumors in consensus. The presence of bright dot sign; laterality; presence of necrosis; size, margin, and shape of the mass were analyzed.
  
  
  RESULTS
  Mean age of patients was 22 years (ranging from 11 to 34 years). Mean size of the tumors was 14 cm (ranging from 11.1 to 18.5 cm). All 10 tumors showed bright dot sign, necrotic portion, and smooth margin in post-contrast CT scan. All the tumors were unilateral. Nine of 10 tumors showed oval shape.
  
  
  CONCLUSIONS
  On CT scans, ovarian yolk sac tumors appeared as large, unilateral, smooth marginated mass with bright dot sign and necrotic portion.
authors.affiliation: Department of Radiology, National Cancer Center, Goyang, Gyeonggi, South Korea.
authors.forename: Hyuck Jae
authors.initials: HJ
authors.lastname: Choi
authors.forename: Min Hoan
authors.initials: MH
authors.lastname: Moon
authors.forename: Seung Hyup
authors.initials: SH
authors.lastname: Kim
authors.forename: Jeong Yeon
authors.initials: JY
authors.lastname: Cho
authors.forename: Dae Chul
authors.initials: DC
authors.lastname: Jung
authors.forename: Sung Ran
authors.initials: SR
authors.lastname: Hong
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D003287:Contrast Media; D018240:Endodermal Sinus Tumor / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D007472:Iohexol / Q000031:analogs & derivatives; D015588:Observer Variation; D010051:Ovarian Neoplasms / Q000000981:diagnostic imaging*; D010053:Ovary / Q000000981:diagnostic imaging*; D011856:Radiographic Image Enhancement / Q000379:methods; D012189:Retrospective Studies; D036542:Tomography, Spiral Computed / Q000379:methods*; D055815:Young Adult
chemical_list: D003287:Contrast Media; D007472:Iohexol; C038192:iopromide