Definitions for "Klinefelter's syndrome"
Related Terms:
Turner syndrome, Turner's syndrome, Trisomy 21, Klinefelter syndrome, Trisomy 13, Down syndrome, Down's syndrome, Trisomy 18, Trisomy, Angelman syndrome, Prader-willi syndrome, Mongolism, Fragile x syndrome, Monosomy, Nondisjunction, Y chromosome, Sex chromosome, Birth defect, X chromosome, Aneuploidy, Y-chromosome, Non-disjunction, Chromosomal translocation, Congenital abnormality, Sex chromosomes, X-chromosome, Genetic disorder, Autosomes, Barr body, Congenital, Mosaicism, Williams syndrome, Autosome, Aneuploid, Hurler syndrome, Autosomal, Huntington disease, Tay-sachs disease, Disomy, Fragile site, Haploid, Meiosis, Robertsonian translocation, Translocation, Triploidy, Bivalent, Birth defects, Lesch-nyhan syndrome, Reciprocal translocation
an inherited condition affecting males in which they are born with an extra X chromosome.
a sex-chromosome count of XXY; phenotypically male, tall stature, sterile.
A chromosomal abnormality affecting males caused by the presence of an extra X chromosome. It is characterized by small testes, enlarged breasts, and the absence of facial and body hair.
a genetic disorder in which a man has at least 1 extra X chromosome in his cells, causing infertility and female characteristics
Chromosomal defect in males in which there is an extra X chromosome; manifestations may include underdeveloped testes, physical feminization, sterility, and mental retardation.
a chromosome abnormality that prevents normal male sexual development and causes irreversible infertility due to the presence of an extra female (X) chromosome
syndrome in males that is characterized by small testes and long legs and enlarged breasts and reduced sperm production and mental retardation; a genetic defect in which an extra X chromosome (XXY) is present in the male
a hereditary disorder affecting males, characterized by the presence of an extra female chromosome (XXY instead of XY) within the cells.
A congenital abnormality of men when there is one “X” chromosome too many. Men with this condition are usually sterile.
A syndrome in man resulting from the presence of an extra X chromosome in the male (XXY, XXXY).
A chromosome problem that causes low testosterone levels, breast development, small testes and infertility in men
A genetic abnormality that may cause infertility. It is characterized by having two X chromosomes and one Y chromosome. close window
A genetic abnormality characterized by havingone Y (male) chromosome and two X (female) chromosomes. This condition maycause a fertility problem.
XXY syndrome. A chromosome abnormality in which a male has an extra X chromosome.
A congenital abnormality of the male wherein he receives an XXY chromosomal complement instead of XY. These men are infertile.
A genetic disorder in males caused by having an extra X chromosome. Males with this disorder may have larger than normal breasts, a lack of facial and body hair, a rounded body type, and small testicles. They may learn to speak much later than other children and may have difficulty learning to read and write. Klinefelter's syndrome increases the risk of developing testicular cancer.
Although still commonly used, the term "Klinefelter's syndrome" is slowly being replaced by the term XXY males to describe males having the extra X chromosome. It is the most common chromosomal abnormality in males, resulting in deficient testicular function and occurring in 1 out of 500 live births. Gynecomastia and various degrees of testosterone deficiency are usually noted.
Related Topic"...Gynecomastia and various degrees of testosterone deficiency are usually noted..."
Klinefelter's syndrome, 47XXY or XXY syndrome is a condition caused by a chromosome nondisjunction in males; affected individuals have a pair of X sex chromosomes instead of just one and are at additional risk for some medical conditions. It is named after Dr. Harry Klinefelter, a medical researcher at Massachusetts General Hospital, Boston, Massachusetts, who first described this condition in 1942.Klinefelter HF Jr, Reifenstein EC Jr, Albright .