A 25-year-old lady presented with fever of 1-month duration, ataxia and headache. Brain imaging showed dilated ventricles with basal exudates. Which among the following is the most likely CSF finding –
**Core Concept**
The patient's symptoms and imaging findings are suggestive of Neurosyphilis, a complication of syphilis infection that affects the central nervous system. The presentation with fever, ataxia, and headache, along with dilated ventricles and basal exudates on brain imaging, is consistent with this diagnosis.
**Why the Correct Answer is Right**
The most likely CSF finding in this case is elevated protein levels, particularly gamma globulins, and a high lymphocyte count. This is due to the infection causing an inflammatory response in the CSF, leading to the production of antibodies and activation of immune cells. The presence of basal exudates on imaging also suggests meningitis, which is consistent with these CSF findings.
**Why Each Wrong Option is Incorrect**
* **Option A:** Normal CSF findings would not explain the patient's symptoms and imaging results, which suggest a significant inflammatory response.
* **Option B:** A high glucose level in the CSF is typically seen in bacterial meningitis, but this patient's presentation is more suggestive of viral or parasitic infection, such as neurosyphilis.
* **Option C:** A low lymphocyte count would be unusual in this case, as the patient's symptoms and imaging findings suggest an inflammatory response.
**Clinical Pearl / High-Yield Fact**
In patients with suspected neurosyphilis, a lumbar puncture should be performed to obtain CSF for analysis, as this can help confirm the diagnosis and guide treatment.
**Correct Answer: B. Elevated protein levels, particularly gamma globulins, and a high lymphocyte count.**