Klinefelter syndrome - Symptoms and causes - Mayo Clinic
WebOverview. Klinefelter syndrome is a genetic condition that results when a boy is born with an extra copy of the X chromosome. Klinefelter syndrome is a genetic condition affecting males, and it often isn't diagnosed until adulthood. Klinefelter syndrome may adversely affect testicular growth, resulting in smaller than normal testicles, which ...
Klinefelter Syndrome: What It Is, Symptoms & Treatment - Cleveland Clinic
WebOct 9, 2023 · 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. Treatments usually involve physical and emotional therapy, as well as hormone replacement.
Klinefelter Syndrome: Symptoms, Causes, Diagnosis, and Treatment - WebMD
WebSep 11, 2023 · 3 min read. What Is Klinefelter Syndrome? Klinefelter syndrome is a genetic condition in which a boy is born with an extra X chromosome. Instead of the typical XY...
Klinefelter syndrome - Wikipedia
WebKlinefelter syndrome (KS), also known as 47,XXY, is a chromosome anomaly where a male has an extra X chromosome. These complications commonly include infertility and small, poorly functioning testicles (if present).
Klinefelter syndrome: MedlinePlus Genetics
WebKlinefelter 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 adulthood.
Klinefelter syndrome - Diagnosis and treatment - Mayo Clinic
WebThis may include examining the genital area and chest, performing tests to check reflexes, and assessing development and functioning. The main tests used to diagnose Klinefelter syndrome are: Hormone testing. Blood or urine samples can reveal abnormal hormone levels that are a sign of Klinefelter syndrome.
Klinefelter Syndrome | Johns Hopkins Medicine
WebKlinefelter 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 are less masculine-looking than their peers.
About Klinefelter Syndrome - National Human Genome …
WebMay 19, 2019 · Klinefelter syndrome is a condition that occurs in men as a result of an extra X chromosome. The most common symptom is infertility. Humans have 46 chromosomes, which contain all of a person's genes and DNA. Two of these chromosomes, the sex chromosomes, determine a person's gender.
Klinefelter Syndrome: Symptoms, Genetics, and Treatment
WebJun 7, 2022 · Klinefelter syndrome is caused by a random genetic error that occurs during the formation of the egg or sperm, or after conception. Most commonly, Klinefelter syndrome occurs due to a process referred to as nondisjunction in …
Johns Hopkins Klinefelter Syndrome Center
WebKlinefelter syndrome is a group of conditions that affects the health of males who are born with at least one extra X chromosome. Chromosomes, found in all body cells, contain genes. Genes provide specific instructions for body characteristics and functions. For example, some genes determine height and hair color.
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