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Congenital adrenal hyperplasia with 47, XXY Klinefelter syndrome
1Department of Medicine, Kobe University School of Medicine, Japan.
Insights
This case report details a rare co-occurrence of congenital adrenal hyperplasia (CAH) and Klinefelter syndrome in a Japanese boy. The study highlights the diagnostic challenges and clinical presentation of this unique dual diagnosis.
Area of Science:
- Endocrinology
- Genetics
- Pediatrics
Background:
- Congenital adrenal hyperplasia (CAH) is a group of genetic disorders affecting adrenal hormone production.
- Klinefelter syndrome (47, XXY) is a genetic condition affecting males, characterized by the presence of an extra X chromosome.
Abstract:
We describe here a unique case of congenital adrenal hyperplasia (CAH) accompanied by Klinefelter syndrome. A Japanese boy was diagnosed as having CAH caused by 21-hydroxylase deficiency at birth, but was untreated thereafter until age 10. In the meantime he showed marked acceleration in somatic growth with sexual precocity by age 9, at which time growth completely stopped. During regular follow-ups at our clinic and steroid treatment after age 10, he was recognized as having bilateral small and firm testes. A chromosomal examination and a testicular biopsy revealed a complication of 47, XXY Klinefelter syndrome with CAH. Association of these two diseases has not been reported so far, and the present case is the first one to our knowledge.