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Case Report Open Access

17α‑hydroxylase/17,20‑lyase deficiency in congenital adrenal hyperplasia: A case report

  • Authors:
    • Simiao Xu
    • Shuhong Hu
    • Xuefeng Yu
    • Muxun Zhang
    • Yan Yang
  • View Affiliations / Copyright

    Affiliations: Department of Endocrinology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
    Copyright: © Xu et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 339-344
    |
    Published online on: December 12, 2016
       https://doi.org/10.3892/mmr.2016.6029
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Abstract

Congenital adrenal hyperplasia (CAH) is a rare autosomal recessive disorder caused by mutations in the cytochrome P450 family 17 subfamily A member 1 (CYP17A1) gene located on chromosome 10q24.3, which leads to a deficiency in 17α‑hydroxylase/17,20‑lyase. The disorder is characterized by low blood levels of estrogens, androgens and cortisol, which leads to a compensatory increase in adrenocorticotropic hormone levels that stimulate the production of mineralocorticoid precursors. This subsequently leads to hypertension, hypokalemia, primary amenorrhea and sexual infantilism. Over 90 distinct genetic lesions have been identified in patients with this disorder. The prevalence of common mutation of CYP17A1 gene differs among ethnic groups. Treatment of this disorder involves replacement of glucocorticoids and sex steroids. Estrogen alone is prescribed for patients who are biologically male with 17α‑hydroxylase deficiencies that identify as female. However, genetically female patients may receive estrogen and progesterone supplementation. In the present study, a 17‑year‑old female with 17α‑hydroxylase/17,20‑lyase deficiency that presented with primary amenorrhea and sexual infantilism and no hypertension, was examined. The karyotype of the patient was 46, XX, and genetic analysis revealed the presence of a compound heterozygous mutation in exons 6 and 8, leading to the complete absence of 17α‑hydroxylase/17,20‑lyase activity. The patient was treated with prednisolone and ethinyl estradiol. In addition, a summary of the recent literature regarding CAH is presented.
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Copy and paste a formatted citation
Spandidos Publications style
Xu S, Hu S, Yu X, Zhang M and Yang Y: 17α‑hydroxylase/17,20‑lyase deficiency in congenital adrenal hyperplasia: A case report. Mol Med Rep 15: 339-344, 2017.
APA
Xu, S., Hu, S., Yu, X., Zhang, M., & Yang, Y. (2017). 17α‑hydroxylase/17,20‑lyase deficiency in congenital adrenal hyperplasia: A case report. Molecular Medicine Reports, 15, 339-344. https://doi.org/10.3892/mmr.2016.6029
MLA
Xu, S., Hu, S., Yu, X., Zhang, M., Yang, Y."17α‑hydroxylase/17,20‑lyase deficiency in congenital adrenal hyperplasia: A case report". Molecular Medicine Reports 15.1 (2017): 339-344.
Chicago
Xu, S., Hu, S., Yu, X., Zhang, M., Yang, Y."17α‑hydroxylase/17,20‑lyase deficiency in congenital adrenal hyperplasia: A case report". Molecular Medicine Reports 15, no. 1 (2017): 339-344. https://doi.org/10.3892/mmr.2016.6029
Copy and paste a formatted citation
x
Spandidos Publications style
Xu S, Hu S, Yu X, Zhang M and Yang Y: 17α‑hydroxylase/17,20‑lyase deficiency in congenital adrenal hyperplasia: A case report. Mol Med Rep 15: 339-344, 2017.
APA
Xu, S., Hu, S., Yu, X., Zhang, M., & Yang, Y. (2017). 17α‑hydroxylase/17,20‑lyase deficiency in congenital adrenal hyperplasia: A case report. Molecular Medicine Reports, 15, 339-344. https://doi.org/10.3892/mmr.2016.6029
MLA
Xu, S., Hu, S., Yu, X., Zhang, M., Yang, Y."17α‑hydroxylase/17,20‑lyase deficiency in congenital adrenal hyperplasia: A case report". Molecular Medicine Reports 15.1 (2017): 339-344.
Chicago
Xu, S., Hu, S., Yu, X., Zhang, M., Yang, Y."17α‑hydroxylase/17,20‑lyase deficiency in congenital adrenal hyperplasia: A case report". Molecular Medicine Reports 15, no. 1 (2017): 339-344. https://doi.org/10.3892/mmr.2016.6029
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