Short stature with widely spread nipples and webbing of neck is seen in-
First, I remember that Turner syndrome is a genetic disorder in females caused by the absence of one X chromosome. Common features include short stature, which is a key point here. The other symptoms like webbed neck (pterygium colli) and wide-spaced nipples are also classic signs.
Now, looking at the options, the correct answer should be Turner syndrome. Let me check the other options to be sure. Down syndrome (Trisomy 21) usually has different features like a flat facial profile, epicanthal folds, and hypotonia. Noonan syndrome can have some similar features like webbed neck and short stature, but it's not X-linked and doesn't have the same hormonal issues. Klinefelter syndrome is in males with extra X chromosomes, leading to tall stature and other issues, so that's not a fit here.
Wait, the question says "widely spread nipples" which is a bit different from what I remember. Oh, right, in Turner syndrome, the areolae are more prominent and the nipples are spaced apart. Also, the webbing of the neck is due to lymphatic underdevelopment. So the core concept here is recognizing the physical stigmata of Turner syndrome. The other options don't fit the X-linked aneuploidy aspect. So the correct answer must be Turner syndrome.
**Core Concept**
This question tests recognition of **Turner syndrome (45,X)**, a chromosomal disorder in females caused by complete or partial absence of an X chromosome. Key clinical features include short stature, ovarian dysgenesis, and distinctive physical stigmata such as webbed neck and wide-spaced nipples.
**Why the Correct Answer is Right**
**Turner syndrome** presents with:
- **Short stature** due to growth hormone deficiency and skeletal abnormalities.
- **Webbed neck (pterygium colli)** caused by lymphatic underdevelopment during embryogenesis.
- **Wide-spaced nipples (areolae)** and **shield chest** due to delayed or absent puberty from ovarian failure.
These features result from disrupted development along the **SRY gene pathway**, critical for testis formation in Turner females.
**Why Each Wrong Option is Incorrect**
**Option A:** **Down syndrome (Trisomy 21)** includes intellectual disability, epicanthal folds, and congenital heart defects, but not webbed neck or wide-spaced nipples.
**Option B:** **Noonan syndrome** shares some features (pterygium colli, short stature), but it is autosomal dominant, not X-linked, and lacks ovarian dysgenesis.
**Option C:** **Klinefelter syndrome** (47,XXY) causes tall stature, gynecomastia, and infertility in males, with no webbed neck or wide-spaced nipples.
**Clinical Pearl / High-Yield Fact**
Turner syndrome is diagnosed via **karyotype analysis** in girls with short stature and physical stigmata. Early **growth hormone therapy** improves adult height. Remember the **mnemonic "WEB"**: **W**ebbed neck, **E**ar abnormalities