Klinefelter syndrome - Symptoms and causes - Mayo Clinic
2024年10月29日 · Klinefelter syndrome is a common condition that results when a person assigned male at birth has an extra copy of the X sex chromosome instead of the typical XY. Klinefelter syndrome is a genetic condition that occurs …
Klinefelter syndrome - Wikipedia
Klinefelter syndrome (KS), also known as 47,XXY, is a chromosome anomaly where a male has an extra X chromosome. [10] These complications commonly include infertility and small, poorly functioning testicles (if present).
Klinefelter Syndrome: Symptoms, Causes, Diagnosis, and Treatment - WebMD
2024年10月28日 · Klinefelter syndrome, also known as XXY syndrome, is a condition in boys and men that’s caused by an extra X chromosome. It can affect physical and mental development.
Klinefelter Syndrome: What It Is, Symptoms & Treatment - Cleveland Clinic
Klinefelter syndrome is a common genetic condition in which people assigned male at birth (AMAB) have an additional X chromosome. Symptoms may include breast growth, infertility, osteoporosis and learning difficulties.
Klinefelter Syndrome - Johns Hopkins Medicine
Klinefelter syndrome occurs when a male is born with an extra X chromosome. Thus a male with Klinefelter has XXY instead of the usual XY pair. Because males with this condition produce less of the male hormone testosterone than other males, they …
Klinefelter syndrome - MedlinePlus
Klinefelter syndrome, also called 47,XXY, is a chromosomal condition that affects development in people who are assigned male at birth. The signs and symptoms of Klinefelter syndrome vary. In some cases, the features are so mild that the condition is not diagnosed until puberty or …
What are common symptoms of Klinefelter syndrome (KS)?
Whether or not a male with KS has visible symptoms depends on many factors, including how much testosterone his body makes, if he is mosaic (with both XY and XXY cells), and his age when the condition is diagnosed and treated.
Klinefelter Syndrome (for Parents) | Nemours KidsHealth
What Is Klinefelter Syndrome? Klinefelter syndrome is a fairly common genetic condition found in males only. Many boys with Klinefelter syndrome — also known as XXY syndrome — have no signs or symptoms, and some don't even know they have it until later in life.
Klinefelter Syndrome - Children's Hospital of Philadelphia
In Klinefelter syndrome, there are two X chromosomes and a Y chromosome (XXY). In rare cases, additional X chromosomes (XXXY or XXXXY) may also be linked to Klinefelter syndrome. The condition is confirmed genetically by the demonstration of one or more extra X chromosomes.
XXY Syndrome: What It Is, Causes - Osmosis
2024年6月7日 · XXY syndrome also known as Klinefelter syndrome, is a genetic condition characterized by the presence of an extra X chromosome (47, XXY). Klinefelter syndrome occurs in approximately 1 in 500 to 1,000 males in the United States.