A 7 yr old boy underwent neurosurgery for craniopharyngioma following which pituitary functions were lost. Which of the following hormone should be replaced first ?
**Core Concept**
The question tests the understanding of **hypopituitarism** management, specifically the prioritization of hormone replacement after **pituitary dysfunction**. This requires knowledge of **endocrinology** and **neurosurgery** complications.
**Why the Correct Answer is Right**
In the context of **hypopituitarism** following neurosurgery, the first hormone to be replaced is typically **corticosteroids**, as **adrenal insufficiency** can be life-threatening. The **hypothalamic-pituitary-adrenal axis** is crucial for responding to stress, and its dysfunction can lead to severe consequences.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because while **thyroid hormone** replacement is important, it is not the first priority in the acute management of **hypopituitarism**.
**Option C:** Incorrect as **growth hormone** replacement, although important for long-term growth and development, is not the immediate concern in the post-surgical period.
**Option D:** Incorrect because **gonadotropins** are not immediately critical for survival or acute well-being in a 7-year-old boy.
**Clinical Pearl / High-Yield Fact**
Remember, in **hypopituitarism**, replacing **corticosteroids** first is crucial due to the risk of **adrenal crisis**. This is a high-yield fact for exams and a critical consideration in clinical practice.
**Correct Answer:** Correct Answer: D. Corticosteroids.