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Breast and Ovarian Hereditary Cancer Syndrome (BRCA1 and BRCA2) Deletion/Duplication
2011915
Ordering Recommendation

This is a second tier test and REQUIRES PERMISSION from ARUP's Genetic Counselor (800-242-2787, x2141) before ordering. Preferred initial test is the sequencing and deletion/duplication test.

Mnemonic
BRCA DD
Methodology
Multiplex Ligation-dependent Probe Amplification
Performed
Varies
Reported
Within 14 days
New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
 
Collect
Lavender (EDTA), pink (K2EDTA), or yellow (ACD Solution A or B). 
Specimen Preparation
Transport 3 mL whole blood. (Min: 1 mL) 
Storage/Transport Temperature
Refrigerated. 
Unacceptable Conditions
 
Remarks
 
Stability
Ambient: 72 hours; Refrigerated: 1 week; Frozen: Unacceptable 
Reference Interval
By report
Interpretive Data
Background Information for Breast and Ovarian Hereditary Cancer Syndrome (BRCA1 and BRCA2) Deletion/Duplication
Characteristics:
Female carriers of BRCA1 mutations have a breast cancer risk of 57 percent and ovarian cancer risk of 40 percent by age 70. Female carriers of BRCA2 mutations have a breast cancer risk of 49 percent and ovarian cancer risk of 18 percent by age 70. BRCA1 mutation carriers may also be at increased risk for fallopian, peritoneal, cervical, uterine, and pancreatic cancer. BRCA2 mutation carriers may be at increased risk for pancreatic, stomach, gallbladder, bile duct, and melanoma cancers. Men with BRCA1 mutations are at increased risk for breast cancer and possibly pancreatic, prostate, and testicular cancers while male carriers of BRCA2 mutations are at increased risk for breast, pancreatic and prostate cancers.
Prevalence: 1 in 500 individuals has a BRCA1 or BRCA2 mutation; 5-10 percent of breast cancer and 10-15 percent of ovarian cancer are caused by germline BRCA1 or BRCA2 mutations.
Inheritance: Autosomal dominant.
Cause:
Pathogenic germline mutations in several genes cause hereditary breast and ovarian cancer (HBOC) syndrome. Mutations in tumor suppressor genes, BRCA1 and BRCA2, are causative for the majority of HBOC.
Genes Tested: BRCA1 and BRCA2.
Clinical Sensitivity:
Approximately 10 percent of BRCA1 and BRCA2 mutations.
Methodology: Multiplex ligation-dependent probe amplification (MLPA) to detect large BRCA1 and BRCA2 locus and intragenic deletions/duplications. Analytical Sensitivity and Specificity: 99 percent.
Limitations
: Rare diagnostic errors can occur due to probe site mutations. Breakpoints for large deletions/duplications will not be determined. BRCA1 and BRCA2 base pair substitutions, small deletions/duplications, deep intronic, and regulatory region mutations will not be detected. Other genes causing HBOC syndrome are not tested.

Compliance Statement C: The performance characteristics of this test were validated by ARUP Laboratories. The U.S. Food and Drug Administration (FDA) has not approved or cleared this test. However, FDA approval or clearance is currently not required for clinical use of this test. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions. ARUP is authorized under Clinical Laboratory Improvement Amendments (CLIA) and by all states to perform high-complexity testing. Counseling and informed consent are recommended for genetic testing. Consent forms are available online.

Note
CPT Code(s)
81213
Components
Component Test Code*Component Chart NameLOINC
2011916BRCA DelDup Specimen31208-2
2011917BRCA DelDup Interpretation59041-4
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • HBOC