Test Overview
Test Methodology

MLPA probes hybridize to target regions of the PTEN gene and are amplified by multiplex PCR. The amplification products are analyzed by capillary electrophoresis and copy numbers for these PTEN target regions are generated.

Test Usage

This test is used to detect the presence of PTEN (OMIM:601728) deletions and duplications. PTEN gene deletion and duplication analysis can be performed on a patient whose PTEN sequence analysis was negative and for carrier testing in families with a known PTEN deletion/duplication. Approximately 10% of individuals with Bannayan-Riley-Ruvalcaba syndrome (BRRS), who do not have a mutation detected in the PTEN coding sequence, have deletions within or encompassing the PTEN gene (Zhou et al., Am J Hum Genet. 2003b;73:404–11). Also, PTEN gene deletions have been reported in Cowden syndrome (CS) patients (Zbuk et al. Nat Rev Cancer.2007; 7:35–45; GeneReviews).

Reference Range *

Interpretive report provided.

Test Limitations

This assay will not detect point mutations or frame-shift mutations in the PTEN gene.

Test Details
Days Set Up
Monday - Friday
Analytic Time

21 - 28 days

Soft Order Code
PTED
MiChart Code
PTEN Del/Dup
Synonyms
  • PTEN Del/Dup Shadow
  • PTEDS
  • PTED
  • PTEN Del/Dup Analysis
  • PTEN Gene Deletion and Duplication Analysis
  • Bannayan-Riley-Ruvalcaba Syndrome (BRRS)
  • Cowden Syndrome (CS)
  • PTEN Duplication
  • PTEN Deletion
  • Cowden Disease (CD)
  • Autism / Intellectual Disability
Laboratory
MMGL
Section
MMGL Molecular Genetics
Specimen Requirements
Collection Instructions

Collect specimen in a lavender top tube. Send intact specimen within 24 hours if stored at room temperature or within 5 days if stored refrigerated. Include the patient's family history, pedigree, and ethnicity on the test requisition. Obtaining informed consent from the patient prior to genetic testing is strongly recommended. If desired, a UMHS Request and Consent for Genetic Testing form can be obtained from the MMGL Molecular Genetics Laboratory by contacting the MLabs Client Services Center at 800-862-7284 or online at https://mlabs.umich.edu/sites/default/files/2020-01/file/pci-mmgl_infor….

Lavender Top Tube
Normal Volume
5 - 10 mL EDTA whole blood
Minimum Volume
2 mL EDTA whole blood
Additional Information

By ordering this test the clinician acknowledges that informed consent has been obtained from the patient as required by applicable state or federal laws and the ordering clinician has authorization from the patient permitting MLabs to report the test results to the ordering clinician. Test includes medical geneticist interpretation of results billed as a separate additional charge. This test is not available without interpretation.

Billing
CPT Code
81323
Fee Code
DA025
Pro Fee CPT
G0452-26
NY State Approved
No