Journal
AMERICAN JOURNAL OF CLINICAL PATHOLOGY
Volume 132, Issue 5, Pages 785-793Publisher
OXFORD UNIV PRESS INC
DOI: 10.1309/AJCPPRZLG9KT9AXL
Keywords
Urine; Cytology; Atypia; High grade; Follow-up
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The atypical urothelial cell cytologic category is nonstandardized. We subclassify atypical cases to atypical, favor a reactive process or atypical, unclear if reactive or neoplastic. We evaluated the predictive significance of atypical cases by looking at their histologic follow-up. Among the 1, 114 patients and 3,261 specimens included, 282 specimens had histologic follow-up. An atypical diagnosis did not carry a significant increased risk of urothelial neoplasia compared with the benign category. Although an atypical unclear diagnosis carried a higher rate of detection of high-grade cancer on follow-up biopsy in comparison with atypical reactive or negative diagnoses (26/58 [45%] vs 15/52 [29%] and 16/103 [15.5%], respectively), this difference was not statistically significant. These results suggest that dividing atypical cases into 2 categories based on the level of cytologic suspicion of cancer does not add clinically relevant information within the atypical category. They also raise the question of the significance of the atypical category altogether.
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