What is the difference between Klinefelter's syndrome and Turner syndrome?

Turner syndrome (TS) is caused by having only one X chromosome (X0), and Klinefelter syndrome (KS) by having two X chromosomes and one Y chromosome (XXY).

What do Turner syndrome and Klinefelter syndrome have in common?

These 2 diseases are the most sex chromosome disorders characterized by one extra X in the SK male (47XXY) and the loss of an X in the girls with ST (45 X). Their common characteristic is the gonadal dysgenesis, which is the main cause of male or female infertility.

What is Down syndrome Klinefelter syndrome and Turner syndrome?

Down syndrome, Turner syndrome, and Klinefelter syndrome constitute the most common chromosomal abnormalities encountered by primary care physicians. Down syndrome typically is recognized at birth, Turner syndrome often is not recognized until adolescence,and many men with Klinefelter syndrome are never diagnosed.

What is the male version of Turner syndrome?

Consequently, in the past, Noonan syndrome has been referred to as “male Turner syndrome,” “female pseudo-Turner syndrome,” or “Turner phenotype with normal chromosomes karyotype.” However, there are many important differences between the two disorders.

What is another name for Turner syndrome?

Other names for Turner's syndrome include monosomy X, 45X and Ullrich-Turner syndrome.

Klinefelter (XXY)

Why can't males have Turner syndrome?

Each of us is born with two chromosomes. If you're female, you were born with two X chromosomes. If you're a male, you are born with one X and one Y chromosome. Turner Syndrome occurs when one of the X chromosomes is missing, either partially or completely.

Is Turner syndrome male or female?

Turner syndrome, a condition that affects only females, results when one of the X chromosomes (sex chromosomes) is missing or partially missing. Turner syndrome can cause a variety of medical and developmental problems, including short height, failure of the ovaries to develop and heart defects.

Can females have Klinefelter syndrome?

Klinefelter syndrome affects males only; females cannot have it. Klinefelter syndrome results from a genetic abnormality in which males have an extra copy of the X chromosome.

What is the difference between Turner syndrome and mosaic Turner syndrome?

In classical Turner syndrome, an X chromosome is completely missing. This affects about half of all people with TS. Mosaic Turner syndrome, mosaicism, or Turner mosaicism is where the abnormalities occur only in the X chromosome of some of the body's cells.

How is Turner syndrome and Klinefelter syndrome diagnosed?

Blood or urine samples can reveal abnormal hormone levels that are a sign of Klinefelter syndrome. Chromosome analysis. Also called karyotype analysis, this test is used to confirm a diagnosis of Klinefelter syndrome. A blood sample is sent to the lab to check the shape and number of chromosomes.

What are the causes of Klinefelter syndrome?

Klinefelter syndrome is caused by an additional X chromosome. This chromosome carries extra copies of genes, which interfere with the development of the testicles and mean they produce less testosterone (male sex hormone) than usual.

What is the female version of Klinefelter syndrome?

Turner Syndrome. Turner syndrome occurs in 1/2500 live births. It is caused by a partial or complete absence of one of the X chromosomes in a female.

Why are Klinefelter males tall?

From early school age, boys with Klinefelter's syndrome tend to be taller (increased leg length) because testosterone normally stops boys growing after puberty. This increase in height is maintained throughout life. Patients with Klinefelter's syndrome may have reduced coordination compared with other boys.

What are the characteristics of a person with Klinefelter syndrome?

Is Klinefelter an intersex?

Therefore, according to the NZKA, not all XXY individuals will develop Klinefelter Syndrome, for the Syndrome is simply a form of male hypogonadism, caused by a lack of testosterone: thus XXY is not an intersex condition.

Which parent is responsible for Klinefelter syndrome?

Klinefelter syndrome is not caused by anything the parents did or did not do. The disorder is a random error in cell division that happens when a parent's reproductive cells are being formed.

CAN XXY have babies?

It is possible that an XXY male could get a woman pregnant naturally. Although sperm are found in more than 50% of men with KS³, low sperm production could make conception very difficult.

What is a webbed neck?

Ontology: Neck webbing (C0221217)

A congenital, usually bilateral, thick web-like fold of skin that extends from the acromion to the mastoid process. This deformity is associated with Turner Syndrome and Noonan Syndrome.

Is Turner syndrome a type of dwarfism?

Turner syndrome is a type of dwarfism that only affects females. In addition to being short in stature, girls with Turner syndrome often have heart defects and their ovaries do not develop normally.

Why is Turner syndrome not considered to be inherited?

Most cases of Turner syndrome are not inherited. When this condition results from monosomy X , the chromosomal abnormality occurs as a random event during the formation of reproductive cells (eggs and sperm) in the affected person's parent.

What is Edward syndrome?

A baby with Edwards' syndrome has 3 copies of chromosome number 18 instead of 2. This affects the way the baby grows and develops. Having 3 copies of chromosome 18 usually happens by chance, because of a change in the sperm or egg before a baby is conceived.

What does XO chromosome mean?

Definition. XO syndrome is a disorder of the sex chromosomes, occurring in females, in which one of the two X chromosomes is completely or partially absent. XO syndrome causes a number of symptoms that vary greatly among individuals, but generally include small stature, amennorhea and infertility.

What is Williams syndrome?

Williams syndrome, also known as Williams-Beuren syndrome, is a rare genetic disorder characterized by growth delays before and after birth (prenatal and postnatal growth retardation), short stature, a varying degree of mental deficiency, and distinctive facial features that typically become more pronounced with age.

What is Turner syndrome genotype?

GENOTYPE IN TURNER SYNDROME

TS is a disorder caused by the loss of genetic material from one of the two sex chromosomes (monosomy 45,X) or in a proportion of cells (mosaicism 45,X/46,XX). The genotype is usually specified as, for example, 45,X(10)/46,XX(90).