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  • Test code: 55003
  • Turnaround time:
    10–21 calendar days (14 days on average)
  • Preferred specimen:
    3mL whole blood in a purple-top EDTA tube (K2EDTA or K3EDTA)
  • Alternate specimens:
    Saliva, assisted saliva, buccal swab and gDNA
  • Sample requirements
  • Request a sample kit
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Invitae Comprehensive Porphyrias Panel

Test description

The Invitae Comprehensive Porphyrias Panel analyzes the genes associated with the porphyrias, a heterogeneous group of disorders caused by abnormal heme production.

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Primary panel (10 genes)

ALAD ALAS2 CLPX CPOX FECH GATA1 HMBS PPOX UROD UROS

  • Delta-Aminolevulinic acid dehydratase deficiency porphyria (ADP)
  • X-linked sideroblastic anemia, X-linked erythropoietic protoporphyria
  • Hereditary coproporphyria (HCP), Harderoporphyria
  • Erythropoietic protoporphyria
  • GATA1-related congenital erythropoietic porphyria (CEP)
  • Acute intermittent porphyria (AIP)
  • Variegate porphyria (VP)
  • Porphyria cutanea tarda (PCT), hepatoerythropoietic porphyria (HEP)
  • Congenital erythropoietic porphyria

To view the complete clinical description of this panel, click here.

The porphyrias are inherited in autosomal recessive, autosomal dominant, and X-linked pattern.

Assay and technical information

Invitae is a College of American Pathologists (CAP)-accredited and Clinical Laboratory Improvement Amendments (CLIA)-certified clinical diagnostic laboratory performing full-gene sequencing and deletion/duplication analysis using next-generation sequencing technology (NGS).

Our sequence analysis covers clinically important regions of each gene, including coding exons and 10 to 20 base pairs of adjacent intronic sequence on either side of the coding exons in the transcript listed below. In addition, the analysis covers the select non-coding variants specifically defined in the table below. Any variants that fall outside these regions are not analyzed. Any limitations in the analysis of these genes will be listed on the report. Contact client services with any questions.

Based on validation study results, this assay achieves >99% analytical sensitivity and specificity for single nucleotide variants, insertions and deletions <15bp in length, and exon-level deletions and duplications. Invitae's methods also detect insertions and deletions larger than 15bp but smaller than a full exon but sensitivity for these may be marginally reduced. Invitae’s deletion/duplication analysis determines copy number at a single exon resolution at virtually all targeted exons. However, in rare situations, single-exon copy number events may not be analyzed due to inherent sequence properties or isolated reduction in data quality. Certain types of variants, such as structural rearrangements (e.g. inversions, gene conversion events, translocations, etc.) or variants embedded in sequence with complex architecture (e.g. short tandem repeats or segmental duplications), may not be detected. Additionally, it may not be possible to fully resolve certain details about variants, such as mosaicism, phasing, or mapping ambiguity. Unless explicitly guaranteed, sequence changes in the promoter, non-coding exons, and other non-coding regions are not covered by this assay. Please consult the test definition on our website for details regarding regions or types of variants that are covered or excluded for this test. This report reflects the analysis of an extracted genomic DNA sample. In very rare cases, (circulating hematolymphoid neoplasm, bone marrow transplant, recent blood transfusion) the analyzed DNA may not represent the patient's constitutional genome.

Gene Transcript reference Sequencing analysis Deletion/Duplication analysis
ALAD NM_000031.5
ALAS2 NM_000032.4
CLPX NM_006660.4
CPOX NM_000097.5
FECH NM_000140.3
GATA1 NM_002049.3
HMBS NM_000190.3
PPOX NM_000309.3
UROD NM_000374.4
UROS NM_000375.2