Tigroid white matter on MR spectroscopy seen in:-
**Core Concept**
Tigroid white matter on MR spectroscopy refers to a specific pattern of abnormal brain metabolism, characterized by an abnormal ratio of N-acetylaspartate (NAA) to choline (Cho) and an elevated lactate peak, indicating neuronal loss or damage, particularly in the context of periventricular leukomalacia (PVL) in preterm infants.
**Why the Correct Answer is Right**
Tigroid white matter pattern is a classic finding in PVL, which is a form of brain injury that occurs in preterm infants due to ischemia or oxidative stress. The elevated lactate peak on MR spectroscopy indicates anaerobic metabolism, while the reduced NAA/Cho ratio suggests neuronal loss or damage. This pattern is thought to result from the selective vulnerability of oligodendrocytes to injury, leading to demyelination and axonal damage.
**Why Each Wrong Option is Incorrect**
* **Option A:** Not relevant - Tigroid white matter pattern is not typically associated with this condition.
* **Option B:** Not relevant - This option does not describe a condition characterized by abnormal brain metabolism or demyelination.
* **Option C:** Incorrect - While this condition may involve white matter injury, it is not typically associated with the specific MR spectroscopy pattern described.
**Clinical Pearl / High-Yield Fact**
Tigroid white matter pattern on MR spectroscopy is a classic finding in periventricular leukomalacia (PVL) in preterm infants, indicating neuronal loss or damage and selective vulnerability of oligodendrocytes to injury.
**Correct Answer:** C.