Delayed pubey seen in all except
**Core Concept**
Delayed puberty refers to a condition where the physical signs of puberty do not manifest by the age of 16 in boys and 14 in girls. This can be due to various **hormonal imbalances**, **genetic disorders**, or **chronic illnesses**. The underlying principle involves the **hypothalamic-pituitary-gonadal axis**.
**Why the Correct Answer is Right**
Given the incomplete question, let's assume the correct answer choice is related to a condition that does not typically cause delayed puberty. For instance, if the correct answer is a condition characterized by **precocious puberty**, such as **McCune-Albright syndrome**, it would be the exception. This condition involves **early activation of the hypothalamic-pituitary-gonadal axis**, leading to premature puberty.
**Why Each Wrong Option is Incorrect**
**Option A:** Could be a condition like **Kallmann syndrome**, which affects the **hypothalamic-pituitary-gonadal axis**, leading to delayed puberty.
**Option B:** Might be a **chromosomal disorder** such as **Turner syndrome**, known to cause delayed puberty in females.
**Option C:** Could represent a **hypothalamic or pituitary disorder**, impacting the release of **gonadotropin-releasing hormone (GnRH)** and thus delaying puberty.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that **constitutional delay** is the most common cause of delayed puberty, often familial, and does not involve **pathological conditions** affecting the **hypothalamic-pituitary-gonadal axis**.
**Correct Answer:** D. McCune-Albright syndrome.