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Performance of nuclear matrix protein 22 urine marker and voided urine cytology in the detection of urinary bladder tumors
-
Tomaž Smrkolj
,
Miro Mihelič
Published/Copyright:
December 1, 2010
Abstract
Background: Cystoscopy with urinary cytology is the gold standard for the diagnosis and follow-up of patients with tumors of the urinary bladder. The aim of the study was to evaluate the performance of the nuclear matrix protein 22 (NMP22) tumor marker test, BladderChek® point-of-care test and voided urinary cytology for the detection and follow-up of bladder tumors.
Methods: NMP22 was measured using an ELISA assay in stabilized voided urine and using the BladderChek® test. Voided urinary cytology was performed on urine samples. Results were compared to cystoscopic findings and histopathological examination results after transurethral resection of the bladder lesion.
Results: For the prediction of malignant histopathological result, sensitivity and specificity were 45.2% and 75.0%, respectively, for NMP22 at a cut-off of 7.5 kU/L, 17.7% and 100% for the BladderChek® test and 37.0% and 100% for voided urine cytology. For the prediction of suspicious or positive cystoscopic finding, sensitivity and specificity were 40.4% and 72.1%, respectively, for NMP22 at a cut-off of 7.5 kU/L, 14.8% and 93.8% for the BladderChek® test and 26.8% and 98.1% for voided urine cytology.
Conclusions: The NMP22 quantitative test showed higher sensitivity and lower specificity compared with voided urine cytology, whereas the sensitivity of the BladderChek® test was low. We could not recommend any of the three non-invasive tests as a replacement for cystoscopy for the diagnosis or follow-up of urinary bladder tumors.
Received: 2010-7-8
Accepted: 2010-9-22
Published Online: 2010-12-1
Published in Print: 2011-02-01
©2011 by Walter de Gruyter Berlin New York
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Keywords for this article
cystoscopy;
nuclear matrix protein 22;
urinary bladder neoplasm;
voided urinary cytology
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- Hepcidin: the main regulator of iron homeostasis
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