UroVysion for Detection of Bladder Cancer
Method Description Describes how the test is performed and provides a method-specific reference
Urinary cells are harvested, fixed, and placed on a slide. The Vysis UroVysion probe set, which contains fluorescently labeled DNA probes specific to the centromeres of chromosomes 3, 7, and 17, and to the 9p21 locus is hybridized to the cells on the slide. The slide is washed and counterstained with 4,6-diamidino-2-phenylindole. Fluorescence microscopy with unique band filters is then used to scan the slide for atypical cells (eg, cells with nuclear enlargement or irregularity). These cells are assessed for gains of chromosomes (3, 7, 17) or homozygous 9p21 deletion. If the number of cells with chromosomal gains (polysomy or trisomy) or homozygous 9p21 deletion observed on scanning is sufficient to consider the test result positive, the percentage of transitional cells with polysomy, trisomy, or homozygous 9p21 deletion is determined.(Halling KC, King W, Sokolova IA, et al: A comparison of cytology and fluorescence in situ hybridization for the detection of urothelial carcinoma. J Urol 2000;164:1768-1775; Sokolova IA, Halling KC, Jenkins RB, et al: The development of a multi-target, multi-color fluorescence in situ hybridization assay for the detection of urothelial carcinoma in urine. J Mol Diagn 2000;2:116-123; Halling KC, King W, Sokolova IA, et al: A comparison of BTA stat, hemoglobin dipstick, telomerase, and Vysis UroVysion assays for the detection of urothelial carcinoma in urine. J Urol 2002; 167:2001-2006)
Day(s) and Time(s) Test Performed Outlines the days and times the test is performed. This field reflects the day and time the sample must be in the testing laboratory to begin the testing process and includes any specimen preparation and processing time required before the test is performed. Some tests are listed as continuously performed, which means assays are performed several times during the day.
Monday through Friday; 6 a.m.- 8 p.m., Saturday 10:00 a.m. – 6:30 p.m. and Sunday; 1 p.m.- 9:30 p.m.
Analytic Time Defines the amount of time it takes the laboratory to setup and perform the test. This is defined in number of days. The shortest interval of time expressed is "same day/1 day," which means the results may be available the same day that the sample is received in the testing laboratory. One day means results are available 1 day after the sample is received in the laboratory.
Maximum Laboratory Time Defines the maximum time from specimen receipt at Mayo Medical Laboratories until the release of the test result
Specimen Retention Time Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded
Performing Laboratory Location The location of the laboratory that performs the test