PMC Hereditary Hyperparathyroidism Panel

Up to 8 genes Turn around Time: 10 business days
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Test Description

PMC Hereditary Hyperparathyroidism Panel examines genes linked to an increased risk of hyperparathyroidism. Due to the genetic diversity of these conditions| relying solely on symptoms can be challenging to pinpoint a definitive cause. With the overlapping symptoms of hyperparathyroidism| a broad panel test allows for a more efficient assessment of multiple potential genes for individuals with similar clinical symptoms.
Some genes included in this panel may also be associated with conditions unrelated to the clinical indication for testing. This test is specifically for hereditary germline mutations and is not suitable for detecting somatic mutations in tumor tissue.

  • Associated Conditions
    • Autosomal dominant hypocalcemia (ADH)
    • CDC73-related conditions (hyperparathyroidism-jaw tumor syndrome (HPT-JT), parathyroid carcinoma, and familial isolated hyperparathyroidism (FIH)
    • Familial hypocalciuric hypercalcemia (FHH)
    • Familial isolated hyperparathyroidism (FIHP)
    • Multiple endocrine neoplasia type 1 (MEN1)
    • Multiple endocrine neoplasia type 2 (MEN2)
    • Multiple endocrine neoplasia type 4 (MEN4)
  • Methodology

    Targeted Exome/ Slice Exome (Next Generation Sequencing including Copy Number Variation)

  • Assay Information
    • MEN1: Sequencing analysis for exons 2 includes only cds +/- 10 bp.
    • GNA11: This test is not validated to detect or quantify variant mosaicism and caution should be used while interpreting results for this gene in which mosaicism or somatic variation is an established cause of disease.
  • Limitations

    All sequencing technologies have limitations. A negative result from this analysis does not rule out a possible genetic diagnosis as some variants may not be detected by this test. This test is not designed to detect low level mosaicism, structural rearrangements, indels >40bp, deep intronic variants of unknown clinical significance, or large cytogenetic CNVs. Certain inherent qualities of the human genome, for example repetitive regions/homopolymers, GC rich, pseudogenes, and rare polymorphisms, pose significant technical challenges such as sequence misalignment that may potentially impact the accuracy of the results. False negative results may also occur in the setting of allogeneic bone marrow, stem cell transplantation, active or chronic hematologic conditions, recent blood transfusions, suboptimal DNA quality or PCR trace contamination. Other potential sources of error include sample mix-ups and clerical issues.

  • References
    • 1. Richards S et al. Genetics in medicine. Standards and guidelines for the interpretation of sequence variants: a joint consensus recommendation of the American College of Medical Genetics and Genomics and the Association for Molecular Pathology. 2015 May;17(5):405-24 (PMID: 25741868)
    • 2. GnomAD (gnomAD)
    • 3. CSPEC (ClinGen variant classification rules registry) Criteria Specification Registry
    • 4. Normal copy number variation in healthy individuals database of genomic variants: http://dgv.tcag.ca/dgv/app/home
  • Tagged Genes

    Primary panel:

    8 genes selected