Accuracy and false-positive rate of the cytologic diagnosis of follicular cervicitis: Observations from the College of American Pathologists Pap educational program

Manon Auger*, Walid Khalbuss, Ritu Nayar, Chengquan Zhao, Patricia Wasserman, Rhona Souers, Nicole Thomas, Ann T. Moriarty

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Context. - Follicular cervicitis is usually easily identifiable on Papanicolaou (Pap) tests; however, historically, follicular cervicitis is reported to lead to false-positive diagnoses of epithelial cell abnormalities. Objective. - To assess participant responses in the College of American Pathologists (CAP) Pap educational program (CAP-PAP) to determine the accuracy and false-positive rate of follicular cervicitis cases. Design. - We performed a retrospective review of 4914 participant responses for gynecologic cytology challenges with the reference diagnosis of follicular cervicitis during 11 years (2000-2010) from CAP-PAP. Reference diagnosis category, false-positive rates by participant type (laboratory, cytotechnologist, pathologist), and preparation type (conventional smears, ThinPrep) were analyzed. Results. - Of the total 4914 general category responses, 4368 (88.9%) were benign while 546 (11.1%) responses were epithelial cell abnormalities (false positives). Of benign responses, only 2026 (46.4%) were an exact match to follicular cervicitis. Adenocarcinoma and high-grade squamous intraepithelial lesion were the most common diagnoses chosen as a false-positive interpretation (42.3% and 20.1%, respectively). Participant type was significantly associated with false-positive interpretations (laboratory: 19.2%; cytotechnologist: 11.1%; pathologist: 7.9%; P < .001). ThinPrep was also significantly associated with false-positive results as compared to conventional smears (12.2% versus 3.6%; P < .001). Conclusions. - In an interlaboratory comparison educational program, follicular cervicitis is difficult to interpret accurately and represents an important cause of falsepositive responses. Follicular cervicitis may mimic adenocarcinoma or high-grade squamous intraepithelial lesion, particularly in liquid-based preparations. The diagnostic difficulty most likely arises from the lymphocytes being less conspicuous in the background as well as their tendency to aggregate in ThinPrep as compared to conventional smears.

Original languageEnglish (US)
Pages (from-to)907-911
Number of pages5
JournalArchives of Pathology and Laboratory Medicine
Volume137
Issue number7
DOIs
StatePublished - Jul 1 2013

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Medical Laboratory Technology

Fingerprint Dive into the research topics of 'Accuracy and false-positive rate of the cytologic diagnosis of follicular cervicitis: Observations from the College of American Pathologists Pap educational program'. Together they form a unique fingerprint.

Cite this