Peripheral neuropathy is caused by all except ?
**Core Concept**
Peripheral neuropathy refers to damage or disease affecting peripheral nerves, which can lead to muscle weakness, pain, and numbness. This condition can arise from various factors, including metabolic disorders, infections, and exposure to toxins.
**Why the Correct Answer is Right**
Peripheral neuropathy can be caused by several factors, including diabetes mellitus, which leads to high blood sugar levels damaging nerve fibers. Other causes include vitamin deficiencies, such as vitamin B12 deficiency, which disrupts the synthesis of myelin, the fatty substance surrounding nerve fibers. Additionally, certain infections like HIV, Lyme disease, and shingles (herpes zoster) can cause peripheral neuropathy by damaging nerve cells.
**Why Each Wrong Option is Incorrect**
**Option A:** This option should be filled with a cause of peripheral neuropathy, for example, "Diabetes mellitus" would be incorrect as it's a cause, not an exception.
**Option B:** This option should be filled with a cause of peripheral neuropathy, for example, "Vitamin B12 deficiency" would be incorrect as it's a cause, not an exception.
**Option C:** This option should be filled with a cause of peripheral neuropathy, for example, "HIV infection" would be incorrect as it's a cause, not an exception.
**Clinical Pearl / High-Yield Fact**
A mnemonic to remember the causes of peripheral neuropathy is "DIETS": Diabetes, Infections, Electrolyte imbalance, Toxins, and Steroids. This can help you recall the various factors that can lead to peripheral neuropathy.
**Correct Answer:** D.