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  • Title: Role of ThinPrep liquid-based cytology in evaluation of the endocervical canal in patients with abnormal cervical screening.
    Author: Al-Nourhji O, Dermawan JK, Booth CN, Underwood D, Abdul-Karim FW.
    Journal: J Am Soc Cytopathol; 2019; 8(5):278-283. PubMed ID: 31186178.
    Abstract:
    INTRODUCTION: Endocervical sampling is frequently used as an adjunct to colposcopy. Few studies address the role of endocervical brushing (ECB) with liquid-based cytology (LBC) for evaluation of the endocervical canal. We assessed the roles of ThinPrep (TP) LBC of ECB specimens and cell blocks (CBs). MATERIALS AND METHODS: Pathology archives were searched for ECB specimens from 2010-2015. Preceding Papanicolaou test interpretation, human papillomavirus status, concurrent and follow-up surgical specimens, and ECB diagnoses were recorded. CB cellularity, when available, was scored on a scale of 0 to 4. The cellularity of the TP and CBs was compared. RESULTS: Of 365 ECB cases, 6 (1.6%) were insufficient for diagnosis, compared with a 5% rate for endocervical curettings. Eleven ECB cases (3%) showed low cellularity. Of the 241 (66%) cases with concurrent biopsies, the ECB diagnosis agreed with the biopsy diagnosis (within 1 grade) in 198 (82%) cases. In 9 (2.5%) cases, ECB was the only means of diagnosis of a high-grade squamous intraepithelial lesion / adenocarcinoma in situ confirmed on follow-up. Compared with TP LBC, the CBs (performed in 84 [23%] of cases) were of greater cellularity in 30 (42%) and of equal cellularity in 17 (24%). None of the CBs showed an additional epithelial abnormality missed in TP LBC. CONCLUSIONS: TP LBC is capable of detecting endocervical epithelial abnormalities and may be used as a substitute for endocervical curettings. Performing a CB did not lead to detection of additional abnormalities, although it complemented TP findings and facilitates the performance of ancillary studies.
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