Document Detail

Reproducibility of subclassification of squamous intraepithelial lesions: conventional versus ThinPrep paps.
MedLine Citation:
PMID:  17051069     Owner:  NLM     Status:  PubMed-not-MEDLINE    
OBJECTIVE: Liquid-based cytologic methods are increasingly used, and classification of squamous intraepithelial lesions (SIL) affects patient management. This study compared interobserver reproducibility in SIL subclassification on conventional (CV) and ThinPrep (TP) cytologic specimens. MATERIALS AND METHODS: Four reviewers independently subclassified SIL on 69 CV and 60 TP Paps. Specimens were retrieved by computer search of biopsy-confirmed SIL cases. A consensus interpretation of low-grade SIL (LSIL) or high-grade SIL (HSIL) was assigned when three or four observers agreed. RESULTS: All four observers agreed in 40 of 69 CV with consensus reached in 56 of 69 CV Paps (81%; 20 LSIL, 36 HSIL). For TP Paps, 38 of 60 had 100% agreement, with consensus reached in 56 of 60 TP Paps (93%; 28 LSIL, 26 HSIL, 2 SIL, difficult to grade). kappa values for all four observers were 0.48 for CV (fair agreement) and 0.63 for TP (substantial). Pairwise kappa values ranged from 0.44 to 0.60 for CV and 0.54 to 0.76 for TP. Most of the nonconsensus cases included SIL, difficult to grade interpretations; in several, the original cytologic or biopsy SIL classification, or both, was also indeterminate, or cytologic and biopsy results did not correlate exactly. High-grade biopsies followed 15% of LSIL CV and 36% of LSIL TP. CONCLUSIONS: Interobserver reproducibility in SIL subclassification may be better on TP Paps; however, both CV and TP have indeterminate lesions with low interobserver agreement. The TP specimens did not show improved correlation with histologic analysis, and specimens with consensus do not always have correlating biopsy findings.
Kristi C Adams; Kimberly J Absher; Yolanda M Brill; Donald B Witzke; Diane D Davey
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of lower genital tract disease     Volume:  7     ISSN:  1089-2591     ISO Abbreviation:  J Low Genit Tract Dis     Publication Date:  2003 Jul 
Date Detail:
Created Date:  2006-10-19     Completed Date:  2009-12-16     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9704963     Medline TA:  J Low Genit Tract Dis     Country:  United States    
Other Details:
Languages:  eng     Pagination:  203-8     Citation Subset:  -    
Department of Pathology and Laboratory Medicine, University of Kentucky, Lexington, KY, USA.
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