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Klinefelter syndrome

Alternative Names: 47 X-X-Y syndrome Signs and tests: The patient may have the following signs: Small, firm testicles Small penis Sparse pubic, armpit, and facial hair Sexual problems Enlarged breasts (called gynecomastia) Tall stature Abnormal body proportions (long legs, short trunk) Text Continues Below Adults may come to the doctor because of infertility. School-age children may be brought in to evaluate learning disabilities. The following test results may be found: Karyotyping -- shows 47 XXY Semen count -- low Serum testosterone -- low Serum luteinizing hormone -- high Serum follicle stimulating hormone -- high Serum estradiol levels (a type of estrogen) -- high

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