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Genomics Precision Diagnostic > Endocrinology > Endocrinology Congenital Adrenal Hyperplasia

Congenital Adrenal Hyperplasia

Congenital Adrenal Hyperplasia (CAH) is a group of diseases that are associated with variants or mutations in the genes that are involved in hormone production.
Overview
Indication
Clinical Utility
Genes & Diseases
Methodology
References

Overview

  • Congenital Adrenal Hyperplasia (CAH) is a group of diseases that are associated with variants or mutations in the genes that are involved in hormone production. Specifically, CAH occurs when there is an excess of hormones in the adrenal gland. 

  • The classical form presents with prenatal onset of virilization caused by enzyme deficiency. Additionally, there is an imbalance of body hormones which could have severe effects throughout and individual’s lifetime including problems with fertility, obesity and hypertension.

  • The nature of the genetic variants and genes associated with CAH means that testing for the condition is not straight forward. CAH can be tested for in three ways – CYP21A2 gene sequencing, CYP21A2 del/dup by MLPA and a gene panel associated with CAH not including the CYP21A2 gene. This condition is associated with recessive inheritance and is usually diagnosed at birth. 

  • The Igenomix Congenital Adrenal Hyperplasia Precision Panel can be used to make a directed and accurate differential diagnosis of ambiguous genitalia ultimately leading to a better management and prognosis of the disease. It provides a comprehensive analysis of the genes involved in this disease using next-generation sequencing (NGS) to fully understand the spectrum of relevant genes involved.  

Indication

The Igenomix Congenital Adrenal Hyperplasia Precision Panel is indicated for those patients with clinical suspicion of an CAH presenting with the following manifestations: 

  • Excessive hormone development  
  • Ambiguous genitalia  
  • Cortisol deficiency  
  • Infertility  
  • Obesity  
  • Hypertension  

Clinical Utility

The clinical utility of this panel is: 

  • The genetic and molecular confirmation for an accurate clinical diagnosis of a symptomatic patient.  
  • Early initiation of treatment with a multidisciplinary team for pharmacologic treatment of lacking hormones, corrective surgery, specialist referral and dietary modifications. 
  • Risk assessment of asymptomatic family members according to the mode of inheritance. 

 

Genes & Diseases

Methodology

References

See scientific referrals

Narasimhan, M. L., & Khattab, A. (2019). Genetics of congenital adrenal hyperplasia and genotype-phenotype correlation. Fertility and sterility, 111(1), 24–29. https://doi.org/10.1016/j.fertnstert.2018.11.007 

El-Maouche, D., Arlt, W., & Merke, D. P. (2017). Congenital adrenal hyperplasia. Lancet (London, England), 390(10108), 2194–2210. https://doi.org/10.1016/S0140-6736(17)31431-9 

Merke, D. (2008). Approach to the Adult with Congenital Adrenal Hyperplasia due to 21-Hydroxylase Deficiency. The Journal Of Clinical Endocrinology & Metabolism, 93(3), 653-660. doi: 10.1210/jc.2007-2417 

Hannah-Shmouni, F., Chen, W., & Merke, D. P. (2017). Genetics of Congenital Adrenal Hyperplasia. Endocrinology and metabolism clinics of North America, 46(2), 435–458. https://doi.org/10.1016/j.ecl.2017.01.008 

Stratakis, C. A., & Rennert, O. M. (1999). Congenital adrenal hyperplasia: molecular genetics and alternative approaches to treatment. Critical reviews in clinical laboratory sciences, 36(4), 329–363. https://doi.org/10.1080/10408369991239222 

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