Webbing of neck increased carrying angle, low posterior hairline and short fourth metacarpal are characteristics of –
## **Core Concept**
The question describes a set of physical characteristics that are commonly associated with a specific genetic condition. These features include webbing of the neck, an increased carrying angle of the elbow, a low posterior hairline, and a short fourth metacarpal. These features are typically seen in Turner syndrome, which is a genetic disorder that affects females.
## **Why the Correct Answer is Right**
Turner syndrome is characterized by a variety of physical features due to the complete or partial absence of one X chromosome. The features mentioned, such as **webbing of the neck** (also known as pterygium colli), **increased carrying angle** of the elbow (cubitus valgus), **low posterior hairline**, and **short fourth metacarpal**, are classic physical findings in Turner syndrome. These characteristics result from the abnormal development and growth patterns associated with the condition.
## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because it does not correspond to the condition described by the characteristics provided.
- **Option B:** This option is incorrect because it does not match the clinical features mentioned in the question.
- **Option C:** No specific genetic condition is mentioned here, but given that Turner syndrome fits the description, any other option that does not align with these characteristics would be incorrect.
- **Option D:** This option is incorrect because it does not accurately represent the condition associated with the described physical features.
## **Clinical Pearl / High-Yield Fact**
A key clinical pearl for medical students is to recognize that Turner syndrome is often associated with short stature, gonadal dysgenesis (leading to infertility), and the physical characteristics mentioned. A classic presentation might include a short girl with a webbed neck and other specific features. Early diagnosis and management are crucial for optimizing outcomes.
## **Correct Answer:** . Turner Syndrome