Klinefelter syndrome
Alternative Names
47 X-X-Y syndromeSymptoms
The most common symptom is infertility. Other symptoms may include:
- Small, firm testicles
- Small penis
- Only a little bit of pubic, armpit, and facial hair
- Sexual problems
- Enlarged breasts ( gynecomastia)
- Tall height
- Abnormal body proportions (long legs, short trunk)
Exams and Tests
Adults may come to the doctor because of infertility. School-age children may be brought in to because of learning problems.
The following test results may be found:
- Karyotyping shows 47 XXY.
- Semen count is low.
- Serum testosterone is low.
- Serum luteinizing hormone is high.
- Serum follicle stimulating hormone is high.
- Serum estradiol levels (a type of estrogen) is high.
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