Tigroid Pattern on MRI is associated with which of the following disease?
💡 Explanation
## **Core Concept**
The tigroid pattern on MRI refers to a characteristic appearance of the brain's white matter, resembling a tiger's stripes. This pattern is associated with certain demyelinating or dysmyelinating diseases that affect the central nervous system.
## **Why the Correct Answer is Right**
The tigroid pattern is classically associated with **Pelizaeus-Merzbacher disease**, a rare, genetic, central nervous system disorder. This disease is caused by mutations in the gene that encodes for **proteolipid protein (PLP)**, which is crucial for the formation and maintenance of the myelin sheath. The tigroid pattern observed on MRI is due to the irregular, patchy demyelination in the brain's white matter.
## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because it does not correspond to the correct diagnosis associated with the tigroid pattern on MRI.
- **Option B:** Similarly, this option does not match the condition known for the tigroid pattern.
- **Option D:** This option is also incorrect as it does not represent the disease associated with the described MRI pattern.
## **Clinical Pearl / High-Yield Fact**
A key point to remember is that Pelizaeus-Merzbacher disease is a type of **leukodystrophy**, which is a group of disorders characterized by the abnormal growth or development of the myelin sheath. The tigroid pattern on MRI is a diagnostic clue that can help in narrowing down the differential diagnosis to this specific condition.