H. Ohsaki, Department of Medical Technology, Ehime Prefectural University of Health Sciences, 543 Takooda, Tobe-cho, Iyo-gun, Ehime 791-2101, Japan
Tel.: +81 89 958 2111; Fax: +81 89 958 2177;
E-mail: [email protected]

Financial Disclosure: The authors have no connection with any companies or products mentioned in this article.

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Abstract

H. Ohsaki, T. Hirouchi, N. Hayashi, E. Okanoue, M. Ohara, N. Kuroda, E. Hirakawa and Y. Norimatsu
Diagnostic value of urine erythrocyte morphology in the detection of glomerular disease in SurePath™ liquid-based cytology compared with fresh urine sediment examination

Objective: To assess whether the morphology of urine erythrocytes can be an effective tool for distinguishing glomerular disease from lower urinary tract disease in SurePath^™ liquid-based cytology (SP-LBC).

Methods: We examined four morphological parameters of erythrocytes: (1) irregular erythrocytes (of all types including fragmented forms) comprising greater than or equal to 20% of erythrocytes; (2) uniform erythrocytes (>80%); (3) doughnut or target-like shaped (D/T) erythrocytes (≥1%); and (4) acanthocytes (≥1%) in glomerular disease (n = 32) and lower urinary tract disease (n = 20) with SP-LBC slides in cases that had also been assessed by fresh urine sediment examination.

Results: Sensitivity of D/T erythrocytes and acanthocytes (dysmorphic erythrocytes) for glomerular disease were 100% and 87.5%, respectively, with urine sediment examination, and 81.3% and 46.9%, respectively, in SP-LBC slides. Specificity was 100% for D/T erythrocytes and acanthocytes using either procedure. While irregular erythrocytes were specific for glomerular disease using urine sediment examination, they were seen in 70% of those with lower urinary tract disease using SP-LBC slides as a result of the deformation of erythrocytes by the fixative.

Conclusions: Although the sensitivity of D/T erythrocytes and acanthocytes for glomerular disease was lower in SP-LBC slides than fresh urine sediment examination, their specificity was equally high. Therefore, urine erythrocyte morphology is useful in the detection of glomerular disease with the SP-LBC slides. However, morphological features apart from D/T erythrocytes and acanthocytes are not useful in SP-LBC slides.

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Volume24, Issue1

February 2013

Pages 52-57

Diagnostic value of urine erythrocyte morphology in the detection of glomerular disease in SurePath™ liquid-based cytology compared with fresh urine sediment examination

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Diagnostic value of urine erythrocyte morphology in the detection of glomerular disease in SurePath™ liquid-based cytology compared with fresh urine sediment examination

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