Test Overview
Test Methodology

Methylation Specific Multiplex Ligation-dependent Probe Amplification (MS-MLPA) to determine methylation status and copy number changes within PLAGL1 at 6q24.2 / GRB10 at 7p12.1, and MEST at 7q32.2 / MEG3 at 14q32.2.

Test Usage

This test is used to determine methylation status and copy number changes within 6q24.2, 7p12.1, 7q32.2, and 14q32.2. Maternal uniparental disomy 6q24.2 (UPD(6)mat) is associated with transient neonatal diabetes. Maternal uniparental disomy 7 (UPD(7)mat) is associated with pre- and postnatal growth restriction and with Russell-Silver syndrome (RSS). Maternal uniparental disomy 14q32.2 (UPD(14)mat) is associated with Temple syndrome that is characterized by growth failure, muscular hypotonia, precocious puberty, feeding difficulties, and small hands and feet, while paternal uniparental disomy 14q32.2 (UPD(14)pat) is associated with Kagami-Ogata syndrome that is characterized with facial ‘gestalt’ with full cheeks and protruding philtrum, small bell-shaped thorax with coat-hanger appearance of the ribs, abdominal wall defects, placentomegaly, and polyhydramnios.

Reference Range *

Interpretive report provided.

Test Limitations

This MS-MLPA assay will ONLY determine methylation status and copy number changes within 6q24.2, 7p12.1, 7q32.2, and 14q32.2. This test is not able to identify uniparental disomy, methylation status, or copy number changes in other regions of the genome.

Test Details
Days Set Up
Monday - Friday
Analytic Time

28 days

Soft Order Code
UPD
MiChart Code
Uniparental disomy for chr 6, 7 or 14
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 mL EDTA whole blood
Minimum Volume
1 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. 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
81402
Fee Code
DA138
Pro Fee CPT
G0452-26
NY State Approved
No