title: Value of [18F] fluoro-2-deoxy-D-glucose positron emission tomography/computed tomography in diagnosis and localization of Cushing's disease.
abstract: OBJECTIVE
  To explore the value of [18F]fluoro-2-deoxy-D-glucose(18 FDG) positron emission tomography and computer tomography (PET/CT) in the qualitative diagnosis and localization of Cushing's disease.
  
  
  METHODS
  Totally 12 patients underwent transsphenoidal adenomectomy and were histopathologically proven to be with Cushing's disease. 18FDG PET/CT whole-body and brain scannings were performed preoperatively; meanwhile, magnetic resonance imaging (MRI) and 99mTc-octreotide examination were done in all 12 cases, and inferior petrosal sinus sampling (IPSS) were done in 6 patients.
  
  
  RESULTS
  The sensitivity of 18FDG in diagnosing Cushing's disease was 91.6% (11/12), but MRI was 66.7%(8/12). For the 6 patients who performed IPSS, 5 of them was diagnosed to be with Cushing's disease, and only 50% (3/6) were localized correctly in the pituitary gland.
  
  
  CONCLUSIONS
  18FDG PET/CT whole-body scan can exclude ectopic adrenocorticotropin-secreting tumors and localize the pituitary lesions with higher accuracy than MRI. Therefore, it is useful for suspected Cushing's disease, especially for patients their MRI and IPSS have negative or paradoxical results.
authors.affiliation: Department of Nuclear Medicine, PUMC Hospital, CAMS and PUMC, Beijing 100730, China. chengxin72@sohu.com
authors.forename: Cheng
authors.initials: C
authors.lastname: Xin
authors.forename: Cui
authors.initials: C
authors.lastname: Rui-xue
authors.forename: Pan
authors.initials: P
authors.lastname: Hui
authors.forename: Yuan
authors.initials: Y
authors.lastname: Tao
authors.forename: Zhu
authors.initials: Z
authors.lastname: Hui-Juan
authors.forename: Li
authors.initials: L
authors.lastname: Fang
mesh_terms: D000328:Adult; D005260:Female; D019788:Fluorodeoxyglucose F18; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D064847:Multimodal Imaging / Q000379:methods*; D047748:Pituitary ACTH Hypersecretion / Q000000981:diagnostic imaging*; D049268:Positron-Emission Tomography; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed; D055815:Young Adult
chemical_list: D019788:Fluorodeoxyglucose F18