Klinefelter syndrome
A sex chromosome disorder caused by the presence of an extra X chromosome in the male karyotype. Affected individuals are infertile and have a small penis and testes. They tend to have tall stature and long legs and may have difficulties with speech and language development. Gynecomastia may be present.
MONDO:0005027
epilepsy
excluded_subClassOf
MONDO:0017975
sex chromosome disorder of sex development
is_a
MONDO:0700027
chromosome X disorder
is_a
MONDO:0700065
trisomy
is_a
47,XXY syndrome
exact
Klinefelter syndrome
exact
Klinefelter's syndrome
exact
Klinefelter's syndrome, XXY
exact
XXY syndrome
exact
XXY syndrome (Klinefelter syndrome)
exact