Evaluation of NMP22 in the detection of transitional cell carcinoma of the bladder

The Journal of Urology
D S StampferW S McDougal

Abstract

Urinary nuclear matrix protein (NMP22) was evaluated for detection of new and recurrent bladder tumors in patients with a history of transitional cell carcinoma. Our objective was to determine sensitivity and specificity of this marker for tumors of various stages and grades, as well as its use as an adjunct to or substitute for urinary cytology. A total of 231 patients with a history of transitional cell carcinoma provided 288 voided urine samples before cystoscopic examination at 1 of 3 institutions (53 patients were reevaluated at least once). Urine samples were assayed for NMP22 using the NMP22 Test Kit. Select patients underwent biopsy with appropriate additional therapy. Voided urinary cytology was obtained in 200 cases. End points for determination of the absence and presence of tumor were negative cystoscopy and positive biopsy, respectively. A receiver operating characteristics curve was constructed to determine the optimal NMP22 threshold for detection of transitional cell carcinoma. For positive biopsies NMP22 values were also correlated with tumor stage and grade. Comparison to cytology was limited to patients with complete data. There were 208 negative cystoscopies (158 with cytology) and 66 positive cystoscopies w...Continue Reading

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