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Turner syndrome occurs in between one in 2,000 [4] and one in 5,000 females at birth. [5] All regions of the world and cultures are affected about equally. [10] Generally people with Turner syndrome have a shorter life expectancy, mostly due to heart problems and diabetes. [7] American endocrinologist Henry Turner first described the condition ...
Trisomy 18, also known as Edwards syndrome, is a genetic disorder caused by the presence of a third copy of all or part of chromosome 18. [3] Many parts of the body are affected. [ 3 ] Babies are often born small and have heart defects . [ 3 ]
Trisomy X, also known as triple X syndrome and characterized by the karyotype [note 1] 47,XXX, is a chromosome disorder in which a female has an extra copy of the X chromosome. It is relatively common and occurs in 1 in 1,000 females, but is rarely diagnosed; fewer than 10% of those with the condition know they have it.
XX gonadal dysgenesis is a type of female hypogonadism in which the ovaries do not function to induce puberty in a person assigned female at birth, whose karyotype is 46,XX. [1] Individuals with XX gonadal dysgenesis have normal-appearing external genitalia as well as Müllerian structures (e.g., cervix, vagina, uterus).
While Turner syndrome has similarities with renal anomalies and developmental delay, Turner syndrome is only found in females and often expresses differently. In Turner syndrome, there is a lower incidence of developmental delays, left-sided heart defects are constant and the occurrence of renal abnormalities is much lower. [36] Other RASopathies
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The etiology may be congenital and idiopathic, posttraumatic, postinfection, iatrogenic, or secondary to a systemic disease such as cancer, sickle cell disease, pseudohyperparathyroidism, Turner's syndrome, Down syndrome, Apert syndrome, athyroidism, or osteodystrophy. [2] It most frequently involves the fourth metatarsal.
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