PTEN-Related Disorders: PTEN Deletion/Duplication MLPA

Test Information

PTEN Deletion/Duplication (MLPA) is a molecular test used to detect deletions and duplications in the gene associated with PTEN-related disorders including Cowden syndrome and Bannayan-Riley Ruvalcaba syndrome.

Turnaround Time

2 weeks

CPT Code(s)

81323

Cost

$500

Genes

  • PTEN

Clinical Information

PTEN mutations are associated with autism/macrocephaly and PTEN-related hamartoma tumor syndromes.

Indications

Molecular testing is useful to confirm the diagnosis and to identify the disease causing mutations within a family to allow for carrier testing and prenatal diagnosis.

Detection

Sequencing of the PTEN gene can detect mutations in: 20% of individuals with autism and macrocephaly 80% of individuals who meet the diagnostic criteria for Cowden syndrome 60% of individuals with a clinical diagnosis of Bannayan-Riley-Ruvalcaba syndrome 50% of individuals with Proteus-like syndrome

Specimen Requirements

The preferred sample type is peripheral blood collected in an EDTA (purple top) tube - at least 2-3ml for pediatric patients and 5-6ml for adult patients. Extracted DNA and saliva are also accepted for this test. Saliva samples must be submitted in an approved saliva kit. Contact the lab to receive a saliva kit or to have one sent to your patient.

Transport Instructions

The specimen should be kept at room temperature and delivered via overnight shipping. If shipment is delayed by one or two days, the specimen should be refrigerated and shipped at room temperature. Do not freeze the specimen. Samples collected on Friday can be safely designated for Monday delivery.

Prenatal Testing Information

Prenatal diagnosis is available if the familial mutations are known. Additional fees for cell culture and maternal cell contamination may apply. Maternal cell contamination studies are required for all prenatal molecular tests. Contact the laboratory prior to sending a prenatal specimen.

Have Questions? Need Support?

Call our laboratory at 1-800-473-9411 or contact one of our Laboratory Genetic Counselors for assistance.
Robin Fletcher, MS, CGC
Falecia Thomas, MS, CGC

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