Which of the following causes peripheral neuritis ?
**Core Concept**
Peripheral neuritis refers to inflammation of the peripheral nerves, which can lead to damage and disruption of nerve function. This condition often results from an autoimmune response, where the body's immune system mistakenly attacks and damages the nerve tissue.
**Why the Correct Answer is Right**
The correct answer is associated with a condition where the immune system mistakenly targets the myelin sheath, the fatty insulating layer surrounding peripheral nerves. This leads to demyelination and damage to the nerve fibers, causing symptoms of peripheral neuritis. The condition is characterized by the presence of autoantibodies against the myelin sheath, specifically against the myelin-associated glycoprotein (MAG).
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because while it may cause neuropathy, it is more commonly associated with central nervous system damage.
**Option B:** This is incorrect because it primarily causes damage to the spinal cord, rather than peripheral nerves.
**Option C:** This option is incorrect because it is more commonly associated with central nervous system damage and demyelination.
**Clinical Pearl / High-Yield Fact**
The presence of autoantibodies against the myelin-associated glycoprotein (MAG) is a characteristic feature of this condition, making it an important diagnostic clue for peripheral neuritis.
**Correct Answer: C.**