CSF with raised protein and low glucose is seen in all except:
**Core Concept**
Intracranial pathology can lead to changes in cerebrospinal fluid (CSF) composition, including protein levels and glucose concentration. Elevated protein and low glucose in CSF can indicate various conditions, such as bacterial meningitis, viral infections, or other forms of central nervous system (CNS) inflammation.
**Why the Correct Answer is Right**
Bacterial meningitis is characterized by elevated CSF protein due to inflammation and breakdown of the blood-brain barrier, and low glucose levels due to bacterial consumption of glucose. This condition is often associated with a high white blood cell count and elevated lactate levels in CSF. The presence of bacteria in CSF can be confirmed by Gram stain or culture.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not provide a specific condition associated with elevated CSF protein and low glucose. It is a distractor that lacks clinical relevance.
**Option B:** Viral meningitis, while causing elevated CSF protein, typically presents with normal or only slightly low glucose levels, making it less likely to be the correct answer.
**Option C:** This option is incorrect as it does not provide a specific condition associated with elevated CSF protein and low glucose. It is a distractor that lacks clinical relevance.
**Clinical Pearl / High-Yield Fact**
When interpreting CSF results, it's essential to consider the clinical context, including patient symptoms, laboratory findings, and imaging studies. Elevated CSF protein and low glucose levels can indicate a bacterial infection, but other conditions, such as viral infections or CNS malignancies, should also be considered.
**Correct Answer: A.