title: Imaging features and pathologic characteristics of ovarian thecoma.
abstract: OBJECTIVE
  To analyze the imaging findings of ovarian thecoma and to better understand the tumor features based on aspect of computed tomography and magnetic resonance images.
  
  
  METHODS
  Nineteen ovarian thecomas confirmed by histopathologic examination were analyzed retrospectively. Image characteristics were analyzed and compared with those of the pathologic features.
  
  
  RESULTS
  The mean diameter of tumors was 9.6 cm. The masses were well defined (n = 17) or ill defined (n = 2) and appeared solid with cystic areas (n = 11), entirely solid (n = 4), or cystic with solid components (n = 4). On T2-weighted/spectral adiabatic inversion recovery (T2WI/SPAIR) images, 12 cases appeared isointense or slightly hyperintense. Of the 12 cases, 8 had patchy hypersignal areas. On computed tomographic images, 7 cases showed hypodensity or isodensity. All tumors exhibited mild enhancement. On pathologic examination, the tumor was composed of spindle cells with a moderate amount of cytoplasm.
  
  
  CONCLUSIONS
  Imaging manifestations of ovarian thecoma are various and nonspecific. However, a large, well-defined mildly enhanced solid mass with cystic areas and especially isointense or slightly hyperintense on T2WI/SPAIR sequence in pelvic cavity may suggest the diagnosis of ovarian thecoma.
authors.affiliation: Department of Radiology, The First Affiliated Hospital of Guangzhou Medical College, China.
authors.forename: Xinchun
authors.initials: X
authors.lastname: Li
authors.forename: Weidong
authors.initials: W
authors.lastname: Zhang
authors.forename: Guangbin
authors.initials: G
authors.lastname: Zhu
authors.forename: Congpeng
authors.initials: C
authors.lastname: Sun
authors.forename: Qingyu
authors.initials: Q
authors.lastname: Liu
authors.forename: Yuechun
authors.initials: Y
authors.lastname: Shen
mesh_terms: D000328:Adult; D000368:Aged; D003287:Contrast Media; D005260:Female; D019786:Gadolinium DTPA; D006801:Humans; D007150:Immunohistochemistry; D007472:Iohexol / Q000031:analogs & derivatives; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008875:Middle Aged; D010051:Ovarian Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D012189:Retrospective Studies; D013798:Thecoma / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D014057:Tomography, X-Ray Computed / Q000379:methods*
chemical_list: D003287:Contrast Media; D007472:Iohexol; C038192:iopromide; C064925:gadodiamide; D019786:Gadolinium DTPA