Which of the following statements about Turner syndrome is true?
Turner syndrome is a genetic disorder that affects females, often leading to a variety of health issues and developmental challenges. It is caused by the incomplete or partial absence of one of the X chromosomes, typically the second X chromosome. This condition is not hereditary, meaning it is not passed down from parents to children. Understanding the true nature of Turner syndrome is crucial for those affected and their families to seek appropriate medical care and support.
Statement A: Turner syndrome is a common genetic disorder in males.
This statement is false. Turner syndrome primarily affects females, with an estimated incidence of 1 in 2,500 to 2,500 to 5,000 live births. While males can have a condition with a similar genetic makeup, known as Klinefelter syndrome, it is not the same as Turner syndrome.
Statement B: Turner syndrome is characterized by the complete absence of the X chromosome.
This statement is false. Turner syndrome is caused by the incomplete or partial absence of one of the X chromosomes, not the complete absence. The remaining X chromosome may be normal or carry genetic abnormalities.
Statement C: Individuals with Turner syndrome have no risk of developing breast cancer.
This statement is false. Individuals with Turner syndrome have an increased risk of developing breast cancer, particularly at a younger age. Regular breast cancer screening, including mammograms and breast MRI, is recommended for women with Turner syndrome to detect any potential abnormalities early.
Statement D: Turner syndrome is characterized by short stature, webbed neck, and a lack of breast development.
This statement is true. Individuals with Turner syndrome often exhibit short stature, a webbed neck, and a lack of breast development. These physical features are some of the most common signs of the condition. However, it is important to note that not all individuals with Turner syndrome will have all of these features, as the condition can vary widely in its presentation.
Statement E: Turner syndrome is a hereditary condition that can be passed down from parents to children.
This statement is false. Turner syndrome is not hereditary and cannot be passed down from parents to children. It is caused by a random genetic event during the formation of the egg or sperm cells or early in胚胎 development.
In conclusion, the true statement about Turner syndrome is D: It is characterized by short stature, webbed neck, and a lack of breast development. Understanding the accurate information about Turner syndrome is essential for proper diagnosis, management, and support for those affected by this condition.
