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TTR Gene Sequencing

FORMS AND DOCUMENTS

TEST DETAILS

Genes:
TTR
Disorders:
Clinical Utility:
  • Confirmation of a clinical diagnosis
  • Differentiation between cardiac amyloidosis and other cardiomypopathies
  • Carrier testing in at-risk family members
  • Prenatal diagnosis
Lab Method:
Capillary Sequencing

ORDERING

Test Code:
363
Turnaround Time:
4-5 weeks
Preferred Specimen:
2-5 mL Blood - Lavender Top Tube

BILLING

CPT Codes:
81404x1
List Price:
$650.00
Billing Information:
View Cardiology Billing Policy
ICD Codes:
  • 425.7: Nutritional and metabolic cardiomyopathy; Code first underlying disease, as: amyloidosis (277.30-277.39), beriberi (265.0), cardiac glycogenosis (271.0), mucopolysaccharidosis (277.5), thyrotoxicosis (242.0-242.9)
  • 277.39: Other amyloidosis, Hereditary cardiac amyloidosi,s Inherited systemic amyloidosis, Neuropathic (Portuguese) (Swiss) amyloidosis, Secondary amyloidosis
  • 277.3: Amyloidosis, unspecified Amyloidosis NOS

REFERENCES

  1. Seikijima Y et al. Transthyretin amyloidosis, In: GeneReviews. Last Update: March 15, 2006. http://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=gene&part=tfap
  2. Hou et al. (2007) Transthyretin and familial amyloidotic polyneuropathy FEBS 274, 1637-50
  3. Jacobson DR et al. Variant-sequence transthyretin (isoleucine 122) in late-onset cardiac amyloidosis in Black Americans. New Eng. J. Med. 336: 466-473, 1997
  4. Coelho T et al. A study of 159 Portuguese patients with familial amyloidotic polyneuropathy (FAP) whose parents were both unaffected. J. Med. Genet. 31: 293-299, 1994
  5. Holmgren G et al. Geographical distribution of TTR met-30 carriers in northern Sweden: discrepancy between carrier frequency and prevalence rate. J. Med. Genet. 31: 351-354, 1994
  6. Ikeda S et al. Asymptomatic homozygous gene carrier in a family with type I familial amyloid polyneuropathy. Europ. Neurol. 32: 308-313, 1992
  7. Holmgren G et al. Homozygosity for the transthyretin-met30-gene in seven individuals with familial amyloidosis with polyneuropathy detected by restriction enzyme analysis of amplified genomic DNA sequences. Clin. Genet. 41: 39-41, 1992
  8. Online Mendelian Inheritance in Man. www.ncbi.nlm.nih.gov/sites/entrez?db=OMIM
  9. Ando, Y. et al. (2005) Transthyretin-related Familial Amyloidotic Polyneuropathy Arch Neurol 62, 1057-62
  10. Saraiva, M.J.M. (2001) Transthyretin Mutations in Hyperthyroxinemia and Amyloid Disease Hum Mutat 17, 493-503
  11. Sekijima et al. (2005) The biological and chemical basis for tissue-selective amyloid disease Cell 121, 73-85

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