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HelpTest ID CDH1Z CDH1 Gene, Full Gene Analysis, Varies
Useful For
Confirmation of suspected clinical diagnosis of hereditary diffuse gastric cancer
Identification of familial CDH1 variant to allow for predictive testing in family members
Predictive testing of an asymptomatic child is not recommended.
Additional Tests
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| COLAB | Hereditary Colon Cancer CGH Array | Yes, (order FMTT) | Yes |
Testing Algorithm
When this test is ordered, array comparative genomic hybridization will always be performed at an additional charge.
Special Instructions
Method Name
Polymerase Chain Reaction (PCR) Amplification followed by DNA Sequencing
COLAB: Gene Dosage Analysis by Array Comparative Genomic Hybridization (aCGH)
Reporting Name
CDH1 Gene, Full Gene AnalysisSpecimen Type
VariesShipping Instructions
Specimen preferred to arrive within 96 hours of collection.
Specimen Required
Patient Preparation: A previous bone marrow transplant from an allogenic donor will interfere with testing. Call 800-533-1710 for instructions for testing patients who have received a bone marrow transplant.
Specimen Type: Whole blood
Container/Tube:
Preferred: Lavender top (EDTA) or yellow top (ACD)
Acceptable: Any anticoagulant
Specimen Volume: 3 mL
Collection Instructions:
1. Invert several times to mix blood.
2. Send specimen in original tube.
Specimen Minimum Volume
1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Varies | Ambient (preferred) | ||
| Frozen | |||
| Refrigerated | |||
Reference Values
An interpretive report will be provided.
Day(s) and Time(s) Performed
Performed weekly, Varies
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Test Classification
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.CPT Code Information
81406
Hereditary Colon Cancer CGH Array, additional test
81228
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| CDH1Z | CDH1 Gene, Full Gene Analysis | 94240-9 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 52487 | Result Summary | 50397-9 |
| 52488 | Result | 82939-0 |
| 52489 | Interpretation | 69047-9 |
| 52490 | Additional Information | 48767-8 |
| 52491 | Specimen | 31208-2 |
| 52492 | Source | 31208-2 |
| 52494 | Array Billed? | No LOINC Needed |
| 52495 | Released By | 18771-6 |
NY State Approved
YesForms
1. New York Clients-Informed consent is required. Document on the request form or electronic order that a copy is on file. The following documents are available in Special Instructions:
-Informed Consent for Genetic Testing (T576)
-Informed Consent for Genetic Testing-Spanish (T826)
2. Molecular Genetics: Inherited Cancer Syndromes Patient Information (T519) in Special Instructions