Hereditary Hemolytic Anemia, NGS - Clinical Genetic Test - GTR

Genetic Testing Registry

View Advanced Search Options

Classic view of this page

Hereditary Hemolytic Anemia, NGS

Clinical Genetic Test

offered by

Mayo Clinic Laboratories

View lab's test page

GTR Test Accession: GTR000553666.5

CAP

HEMATOLOGYINHERITED DISEASEMETABOLIC DISEASE ... View more

Last updated in GTR: 2025-04-11

Last annual review date for the lab: 2024-05-28

At a Glance

Test purpose:

Diagnosis; Prognostic; Risk Assessment; ...

Conditions (36):

Hemolytic anemia due to adenylate kinase deficiency; Anemia, nonspherocytic hemolytic, due to G6PD deficiency; Childhood onset GLUT1 deficiency syndrome 2 more...

Genes (36):

ABCB6 (2q35); AHSP (16p11.2); AK1 (9q34.11); ALDOA (16p11.2); ANK1 (8p11.21) more...

Methods (2):

Molecular Genetics - Deletion/duplication analysis: Next-Generation (NGS)/Massively parallel sequencing (MPS); ...

Target population:

Patients with a personal or family history suggestive of hereditary …

Clinical validity:

Not provided

Clinical utility:

Not provided

Ordering Information

Offered by:

Mayo Clinic Laboratories
View lab's website
View lab's test page

Test short name:

NHHA

Specimen Source:

Peripheral (whole) blood
View specimen requirements

Who can order:

Genetic Counselor
Health Care Provider
Licensed Dentist
Licensed Physician
Nurse Practitioner
Physician Assistant
Public Health Mandate
Registered Nurse

Test Order Code:

NHHA
View other test codes

LOINC codes:

**LOINC codes notice

CPT codes:

81443

**AMA CPT codes notice

Lab contact:

Jessica Bortnova, MS, CGC, Certified Genetic counselor, CGC, Genetic Counselor
GCMolgen@mayo.edu
1-800-533-1710

Contact Policy:

Laboratory can only accept contact from health care providers. Patients/families are encouraged to discuss genetic testing options with their health care provider.

How to Order:

https://www.mayocliniclabs.com/test-catalog/Overview/619033#Specimen
Order URL

Test service:

Result interpretation
OrderCode: 40553

Test development:

Test developed by laboratory (no manufacturer test name)

Informed consent required:

Based on applicable state law

Test strategy:

This test is best interpreted in the context of protein studies and peripheral blood findings. This can be provided by ordering the HAEVP / Hemolytic Anemia Evaluation Profile test. Please fill out the information sheet and indicate that NGS testing was also ordered.

Pre-test genetic counseling required:

Decline to answer

Post-test genetic counseling required:

Decline to answer

Conditions

Total conditions: 36

Condition/Phenotype	Identifier

Test Targets

Genes

Total genes: 36

Gene	Associated Condition	Germline or Somatic	Allele (Lab-provided)	Variant in NCBI

Methodology

Total methods: 2

Method Category

Test method

Instrument

Deletion/duplication analysis

Next-Generation (NGS)/Massively parallel sequencing (MPS)

Illumina HiSeq 2500

Sequence analysis of the entire coding region

Next-Generation (NGS)/Massively parallel sequencing (MPS)

Illumina HiSeq 2500

Clinical Information

Test purpose:

Diagnosis; Prognostic; Risk Assessment; Therapeutic management

Target population:

Patients with a personal or family history suggestive of hereditary hemolytic anemias, including RBC membrane disorders and RBC enzymopathies. Comprehensive testing for patients in whom previous targeted gene variant analyses were negative for a specific hereditary hemolytic anemia Establishing a diagnosis of a hereditary hemolytic anemia or related disorder, allowing … View more

Variant Interpretation:

What is the protocol for interpreting a variation as a VUS?
All detected variants are evaluated according to the most recent American College of Medical Genetics and Genomics (ACMG) and Association for Molecular Pathology (AMP) recommendations. Variants are classified based on known, predicted, or possible pathogenicity and reported with interpretive comments detailing their potential or known significance.

Are family members with defined clinical status recruited to assess significance of VUS without charge?
Decline to answer. Contact lab for details

Will the lab re-contact the ordering physician if variant interpretation changes?
No. The laboratory encourages health care providers to contact the laboratory at any time to learn how the status of a particular variant may have changed over time.

Recommended fields not provided:

Clinical validity, Clinical utility, Is research allowed on the sample after clinical testing is complete?, Sample negative report, Sample positive report

Technical Information

Test Procedure:

Next-generation sequencing (NGS) and/or Sanger sequencing are performed to test for the presence of variants in coding regions and intron/exon boundaries of the genes analyzed, as well as some other regions that have known disease-causing variants. The human genome reference GRCh37/hg19 build was used for sequence read alignment. At least … View more

Test Confirmation:

Supplemental or confirmatory Sanger sequencing is performed when necessary.

Availability:

Tests performed
Entire test performed in-house

Analytical Validity:

Fifteen samples with 30 previously described and/or reported sequencing results were tested and this assay confirmed all previously reported sequence variants with 100% accuracy using the MiSeq and orthogonal confirmatory testing method. Additionally, a variant list generated using the GeT-RM Browser on the NCBI website for two well characterized HapMap … View more

Assay limitations:

Clinical Correlations: Test results should be interpreted in the context of clinical findings, family history, and other laboratory data. Misinterpretation of results may occur if the information provided is inaccurate or incomplete. If testing was performed because of a clinically significant family history, it is often useful to first test … Clinical Correlations: Test results should be interpreted in the context of clinical findings, family history, and other laboratory data. Misinterpretation of results may occur if the information provided is inaccurate or incomplete. If testing was performed because of a clinically significant family history, it is often useful to first test an affected family member. Detection of a reportable variant in an affected family member would allow for more informative testing of at-risk individuals. To discuss the availability of additional testing options or for assistance in the interpretation of these results, contact the Mayo Clinic Laboratories genetic counselors at 800-533-1710. Technical Limitations: Next-generation sequencing may not detect all types of genomic variants. In rare cases, false-negative or false-positive results may occur. The depth of coverage may be variable for some target regions; assay performance below the minimum acceptable criteria or for failed regions will be noted. Given these limitations, negative results do not rule out the diagnosis of a genetic disorder. If a specific clinical disorder is suspected, evaluation by alternative methods can be considered. There may be regions of genes that cannot be effectively evaluated by sequencing or deletion and duplication analysis as a result of technical limitations of the assay, including regions of homology, high guanine-cytosine (GC) content, and repetitive sequences. Confirmation of select reportable variants will be performed by alternate methodologies based on internal laboratory criteria. This test is validated to detect 95% of deletions up to 75 base pairs (bp) and insertions up to 47 bp. Deletions-insertions (delins) of 40 or more bp, including mobile element insertions, may be less reliably detected than smaller delins. Deletion/Duplication Analysis: This analysis targets single and multi-exon deletions/duplications; however, in some instances, single exon resolution cannot be achieved due to isolated reduction in sequence coverage or inherent genomic complexity. Balanced structural rearrangements (such as translocations and inversions) may not be detected. This test is not designed to detect low levels of mosaicism or to differentiate between somatic and germline variants. If there is a possibility that any detected variant is somatic, additional testing may be necessary to clarify the significance of results. For detailed information regarding gene-specific performance and technical limitations, see Method Description or contact a laboratory genetic counselor. If the patient has had an allogeneic hematopoietic stem cell transplant or a recent blood transfusion, results may be inaccurate due to the presence of donor DNA. Call Mayo Clinic Laboratories for instructions for testing patients who have received a bone marrow transplant. Reclassification of Variants: Currently, it is not standard practice for the laboratory to systematically review previously classified variants on a regular basis. The laboratory encourages healthcare providers to contact the laboratory at any time to learn how the classification of a particular variant may have changed over time. Due to broadening genetic knowledge, it is possible that the laboratory may discover new information of relevance to the patient. Should that occur, the laboratory may issue an amended report. Variant Evaluation: Evaluation and categorization of variants are performed using published American College of Medical Genetics and Genomics and the Association for Molecular Pathology recommendations as a guideline.(7) Other gene-specific guidelines may also be considered. Variants are classified based on known, predicted, or possible pathogenicity and reported with interpretive comments detailing their potential or known significance. Variants classified as benign or likely benign are not reported. Multiple in silico evaluation tools may be used to assist in the interpretation of these results. The accuracy of predictions made by in silico evaluation tools is highly dependent upon the data available for a given gene, and periodic updates to these tools may cause predictions to change over time. Results from in silico evaluation tools should be interpreted with caution and professional clinical judgment. Rarely, incidental or secondary findings may implicate another predisposition or presence of active disease. These findings will be carefully reviewed to determine whether they will be reported. View more

Proficiency testing (PT):

Is proficiency testing performed for this test?
Yes

Method used for proficiency testing:
Formal PT program

PT Provider:
American College of Medical Genetics / College of American Pathologists, ACMG/CAP

VUS:

Software used to interpret novel variations
Variants may be analyzed using any combination of the following: Alamut, REVEL, Polyphen-2, SIFT, AGVGD, MutationTaster, SpliceSiteFinder-like, MaxEntScan, NNSPLICE, GeneSplicer, SpliceAI, gene-specific online databases, ISCA, UCSC Genome Browser

Laboratory's policy on reporting novel variations
All novel variants and copy number variants are evaluated for potential pathogenicity and included in the written report, accordingly.

Recommended fields not provided:

Citations to support assay limitations, Description of internal test validation method, Citations for Analytical validity, Description of PT method, Major CAP category, CAP category, CAP test list

Regulatory Approval

FDA Review:

Category: FDA exercises enforcement discretion

Additional Information

Reviews:

PubMed Clinical Queries

Clinical resources:

Molecular resources:

View AK1 variations in ClinVar

RefSeqGene

Coriell Institute for Medical Research

Consumer resources:

MalaCards

NCATS Office of Rare Diseases Research (GARD)

MedlinePlus

IMPORTANT NOTE: NIH does not independently verify information submitted to GTR; it relies on submitters to provide information that is accurate and not misleading. NIH makes no endorsements of tests or laboratories listed in GTR. GTR is not a substitute for medical advice. Patients and consumers with specific questions about a genetic test should contact a health care provider or a genetics professional.