UCSF Navigation Bar

UCSF Departments of Pathology & Laboratory Medicine Home Page

Lab Manual for UCSF Clinical Laboratories

Lab Manual for SFGH

Internal Resources

Click here for more information about laboratory operations and procedures

If you have additional questions regarding this test, please call: 415-353-1667

Search Our Test Menu

RET Proto-oncogene

Item Value
Approval req'd? No
Available Stat? No
Test code RETPO
Performed by Quest
Sendout? Yes
Method PCR and DNA sequencing
Collection Instructions Complete the special history form and submit with specimen.

Click here for Form
Container type Lavender top
Amount to Collect 6 mL blood
Sample type EDTA whole blood
Preferred volume 6 mL blood
UCSF Rejection Criteria Lipemic or markedly hemolyzed sample.
Processing notes Keep sample at room temperature. Do not centrifuge or freeze sample. Slight hemolysis or lipemia do not interfere with the assay, but heavily contaminated samples should be recollected. Include the completed history form. Order Quest # 55426N.
Normal range No mutations detected
Synonyms PCR; MEN2; FMTC mutations; Multiple endocrine neoplasia
Turn around times Test performed Wednesday. Turnaround time: 1-8 days.
Additional information The DNA sequences of exons 10, 11 and 16 of the RET proto-oncogene are amplified and sequenced, seeking particularly mutations in codons known to be "hot spots" for mutations leading to Multiple Endocrine Neoplasia Type 2 (MEN-2). Over 95% of cases of MEN-2A and 85% of cases of Familial Medullary Thyroid Carcinoma (FMTC) are associated with mutations affecting one of five codons in exons 10 (condons 609, 611, 618 and 620) or 11 (codon 634), each of which encodes a conserved cysteine residue in the RET tyrosine kinase receptor protein. Over 95% of individuals with MEN-2B have a germline mutation in codon 918 of exon 16, which converts a methionine to a threonine (designated M918T). Mutation identification can be used to confirm a diagnosis, screen individuals at risk for familial disease, or distinguish familial from sporadic disease.
CPT coding 81404-90, 81405-90
Last Updated 6/21/2016 12:18:48
Entry Number 823
UCSF home page UCSF home page About UCSF Search UCSF UCSF Medical Center