XYY syndrome, also known as Jacobs syndrome, is an aneuploid genetic condition in which a male has an extra Y chromosome. [1] There are usually few symptoms. [2] These may include being taller than average and an increased risk of learning disabilities. [1] [2] The person is generally otherwise normal, including typical rates of fertility. [1]

2024年9月10日 · Jacobs syndrome, also known as 47,XYY syndrome, is a rare genetic condition that occurs in about 1 out of 1000 male children; this condition belongs to a group of conditions known as "sex chromosome trisomies", with Klinefelter syndrome being …

2024年12月5日 · 47,XYY syndrome (Jacobs syndrome) means you have an extra Y chromosome. It often goes undiagnosed due to a lack of obvious symptoms. But the syndrome is associated with an increased risk of certain diagnoses and physical traits. Treatment mainly addresses any physical, mental health or behavioral issues that develop.

XYY综合征是一種人類 男性的性染色體 疾病，正常的男性性染色體是XY，而XYY三體者多出一條Y染色體，所以又稱「超雄综合征」（super-male syndrome）。 XYY综合征在男性新生 嬰兒 中的发生率大约1/1000 [ 1 ] 。

2012年10月3日 · XYY syndrome is a rare chromosomal disorder that affects males. It is caused by the presence of an extra Y chromosome. Males normally have one X and one Y chromosome.

2017年6月7日 · XYY syndrome is a genetic condition that occurs when a male has an extra copy of the Y chromosome in each of their cells (XYY). Sometimes, this mutation is only present in some cells. Males...

2024年9月10日 · Jacobs syndrome, also known as 47,XYY syndrome, is a rare genetic condition that occurs in about 1 out of 1000 male children; this condition belongs to a group of conditions known as "sex chromosome trisomies", with Klinefelter syndrome being the more common type.

The relatively normal cognitive ability and behavioral phenotype of the prenatally diagnosed cohort can provide evidence to reassure parents whose children are karyotyped as XYY in utero and will prove useful in genetic counseling.

47,XYY syndrome is caused by genetic mutations, also known as pathogenic variants. Genetic mutations can be hereditary, when parents pass them down to their children, or they may occur randomly when cells are dividing.

XYY syndrome is characterized by a variable neurodevelopmental phenotype, with features including developmental delays, cognitive impairments, and an increased risk for mental health conditions. There are two recent developments that have primarily motivated this review. The first is the increased u …