title: Placental-site trophoblastic tumor and fluorine-18-fluorodeoxyglucose positron emission tomography/computed tomography.
abstract: OBJECTIVE
  Pre-operative imaging characteristics of placental site trophoblastic tumor (PSTT) are variable and non-specific. Although magnetic resonance imaging (MRI), ultrasonography, chest CT and X-rays findings have been studied the fluorine-18-fluorodeoxyglucose positron emission tomography/computed tomography (¹⁸F-FDG PET/CT) findings of PSTT have not been previously documented. We present the findings of a first case of PSTT evaluated by pre-operative ¹⁸F-FDG PET/CT. A suspicious mass was biopsied and revealed PSTT in post-operative pathological examination. She was referred to the gynecology-oncology department. The ¹⁸F-FDG PET/CT scan revealed a 27 x 20 mm laterally expanded lesion that showed increased ¹⁸F-FDG uptake (SUVmax: 5.20) on the right isthmus of the uterus. The ¹⁸F-FDG PET/CT findings were in accordance with those from chest X-ray/s, CT and pelvic ultrasonography. A systematic, nerve sparing, paraaortic and pelvic lymph node dissection along with total hysterectomy and salpingoopherectomy was performed. The patient was discharged uneventfully.
  
  
  CONCLUSIONS
  ¹⁸F-FDG PET/CT scan was able to identify the mass in the uterus which was shown by pathology to be PSTT. This finding of PET/CT was in accordance with other imaging techniques. Lymphatic mapping of ¹⁸F-FDG PET/CT in this case was also in accordance with surgery and pathology findings.
authors.affiliation: Department of Nuclear Medicine, Suleyman Demirel University, Isparta, Turkey. evrimmd@yahoo.com.
authors.forename: Sevim Süreyya
authors.initials: SS
authors.lastname: Çerçi
authors.forename: Ebru
authors.initials: E
authors.lastname: Erdemoglu
authors.forename: Kemal Kür Şat
authors.initials: KK
authors.lastname: Bozkurt
authors.forename: Yakup
authors.initials: Y
authors.lastname: Yalçn
authors.forename: Evrim
authors.initials: E
authors.lastname: Erdemoglu
mesh_terms: D000328:Adult; D005260:Female; D019788:Fluorodeoxyglucose F18; D006801:Humans; D064847:Multimodal Imaging / Q000379:methods; D049268:Positron-Emission Tomography / Q000379:methods*; D011247:Pregnancy; D019275:Radiopharmaceuticals; D014057:Tomography, X-Ray Computed / Q000379:methods*; D018245:Trophoblastic Tumor, Placental Site / Q000175:diagnosis* / Q000601:surgery*; D014594:Uterine Neoplasms / Q000175:diagnosis* / Q000601:surgery*
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18