Extreme Tall Stature in a Japanese Boy with a 48,XXYY Karyotype
We report an 18-yr-old Japanese boy with a 48,XXYY karyotype and extreme tall stature (194 cm). A GnRH test at 12.5 yr of age showed hypergonadotropism (LH, 4.2 → 72.2 mIU/mL; FSH, 28.9 → 61.7 mIU/mL), and an hCG test at 15.5 yr of age revealed a normal testosterone response (1.67 → 4.08 ng/mL). The...
| Main Authors: | , , |
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| Format: | Online |
| Language: | English |
| Published: |
The Japanese Society for Pediatric Endocrinology
2008
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| Online Access: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4004920/ |