## **Core Concept**
Tuberculous meningitis (TBM) is a form of meningitis caused by *Mycobacterium tuberculosis*, characterized by inflammation of the meninges. Complications of TBM can be severe and include hydrocephalus, cerebral edema, seizures, and vascular complications like cerebral vasculitis and stroke.

## **Why the Correct Answer is Right**
Option describes a condition not typically listed among the common complications of TBM. Common complications include hydrocephalus (obstructive or communicating), cerebral edema, seizures, stroke due to vasculitis, and cranial nerve palsies.

## **Why Each Wrong Option is Incorrect**
* **Option A:** Hydrocephalus is a well-known complication of TBM. It can occur due to obstruction of cerebrospinal fluid (CSF) pathways by inflammatory exudates or due to impaired CSF absorption.
* **Option B:** Cerebral edema is another complication, contributing to increased intracranial pressure and potentially leading to herniation.
* **Option C:** Seizures are a recognized complication, likely due to inflammation, edema, or infarction.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that TBM often presents with a triad of symptoms: headache, fever, and altered consciousness. Early diagnosis and treatment are critical to prevent complications.

## **Correct Answer:** .