Test ID: MLBRF
MLH1 Hypermethylation and BRAF Mutation Analyses, Tumor
Method Description 
Describes how the test is performed and provides a method-specific reference
A PCR-based assay is used to test tumor DNA for the presence of hypermethylation of the MLH1 promoter and for the presence of the V600E mutation within the BRAF gene. The MLH1 hypermethylation method is a modification of the method described by Grady et al.(Domingo E, Laiho P, Ollikainen M, et al: BRAF screening as a low-cost effective strategy for simplifying HNPCC genetic testing. J Med Genet 2004;41:664-668; Grady WM, Rajput A, Lutterbaugh JD, Markowitz S: Detection of aberrantly methylated hMLH1 promoter DNA in the serum of patients with microsatellite unstable colon cancer. Cancer Res 2001;61:900)
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; 8 a.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.
14 days
Maximum Laboratory Time Defines the maximum time from specimen receipt at Mayo Medical Laboratories until the release of the test result
Varies
Specimen Retention Time Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded
Extracted DNA: 3 months
Performing Laboratory Location The location of the laboratory that performs the test
Rochester
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