M.C. complication of mumps in children is
**Core Concept**
Mumps is a viral infection caused by the mumps virus, leading to inflammation of the parotid glands and potentially other complications. In children, mumps can lead to various complications, some of which are more common than others.
**Why the Correct Answer is Right**
The most common complication of mumps in children is orchitis, which is the inflammation of one or both testes. This occurs in approximately 20-30% of post-pubertal males with mumps. Orchitis develops due to the virus's ability to infect the testicular tissue, leading to inflammation and potential damage to the testes. The exact mechanism involves the mumps virus's interaction with the testicular cells, causing an immune response and subsequent inflammation.
**Why Each Wrong Option is Incorrect**
* **Option A:** While meningitis is a possible complication of mumps, it is less common than orchitis in children.
* **Option B:** Pancreatitis can occur in mumps, but it is not the most common complication in children.
* **Option C:** Oophoritis (inflammation of the ovaries) can occur in females with mumps, but it is less common than orchitis in males.
**Clinical Pearl / High-Yield Fact**
Mumps orchitis can lead to testicular atrophy and reduced fertility in affected males. It is essential for clinicians to recognize the signs and symptoms of orchitis in patients with mumps to provide appropriate management and prevent potential long-term consequences.
**Correct Answer: D. Orchitis**