title: Liquid-based cytology for the postirradiation surveillance of women with gynecologic malignancies.
abstract: OBJECTIVE
  To determine the performance of liquid-based cytology using ThinPrep in the postirradiation surveillance of women with gynecologic malignancies.
  
  
  METHODS
  Patients with endometrial and cervical cancer treated with primary or adjuvant radiotherapy between 2000 and 2002 were identified. Details regarding tumor characteristics, treatment, and cytologic and histologic results were abstracted. Binomial variables were compared with the chi-square test. The performance characteristics of liquid-based cytology were evaluated.
  
  
  RESULTS
  A total of 302 liquid-based cytologic samples from 121 women were evaluated. Overall, 294 (97.4%) of the specimens were adequate for interpretation and 132 (44.9%) were within normal limits. Benign cellular changes, including benign radiation changes, were identified in 141 (47.6%). Atypical squamous cells (ASCUS) were found in 15 (5.1%), recurrent dysplasia in 4 (1.3%), and recurrent carcinoma in 2 (0.7%). Follow-up of the 15 ASCUS smears revealed 13 (86.7%) normal smears and 2 cases of squamous intraepithelial lesions. Benign findings were noted in three of the four smears with SIL. The sensitivity for the detection of SIL was 33%, the specificity 99%, and the positive predictive value (PPV) 25%. Of the 4 patients with local recurrences, 2 were detected by cytology. The sensitivity for the detection of recurrent carcinoma was 50%, with a specificity and PPV of 100%.
  
  
  CONCLUSIONS
  ThinPrep for the surveillance of women with gynecologic malignancies treated with radiotherapy is associated with a high rate of satisfactory samples and a low rate of equivocal and ASCUS cytology.
authors.affiliation: Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, MO 63110, USA.
authors.forename: Jason D
authors.initials: JD
authors.lastname: Wright
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Herzog
authors.forename: David G
authors.initials: DG
authors.lastname: Mutch
authors.forename: Randall K
authors.initials: RK
authors.lastname: Gibb
authors.forename: Janet S
authors.initials: JS
authors.lastname: Rader
authors.forename: Rosa M
authors.initials: RM
authors.lastname: Davila
authors.forename: David E
authors.initials: DE
authors.lastname: Cohn
mesh_terms: D002294:Carcinoma, Squamous Cell / Q000473:pathology / Q000532:radiotherapy / Q000601:surgery; D016889:Endometrial Neoplasms / Q000473:pathology* / Q000532:radiotherapy* / Q000601:surgery; D005260:Female; D006801:Humans; D018714:Radiotherapy, Adjuvant; D002583:Uterine Cervical Neoplasms / Q000473:pathology* / Q000532:radiotherapy* / Q000601:surgery; D014626:Vaginal Smears / Q000379:methods*; D002578:Uterine Cervical Dysplasia / Q000473:pathology / Q000532:radiotherapy / Q000601:surgery