Neurodegeneration with iron accumulation in basal ganglia is typically seen in –
**Core Concept**
Neurodegeneration with iron accumulation in basal ganglia is a clinical syndrome characterized by progressive neurological deterioration due to the accumulation of iron in the basal ganglia, leading to neuronal damage and death.
**Why the Correct Answer is Right**
This condition is typically associated with mutations in the PANK2 gene, which encodes the enzyme pantothenate kinase 2 (PANK2). PANK2 is responsible for converting pantothenic acid (vitamin B5) into coenzyme A, an essential cofactor for various enzymatic reactions. Mutations in PANK2 lead to impaired coenzyme A synthesis, resulting in the accumulation of iron in the basal ganglia. This iron accumulation triggers a cascade of oxidative stress and neuroinflammation, ultimately leading to neurodegeneration.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because neurodegeneration with iron accumulation is not typically associated with Huntington's disease, which primarily involves the expansion of CAG repeats in the Huntingtin gene leading to protein aggregation and neurodegeneration.
**Option B:** This option is incorrect because Wilson's disease is characterized by copper accumulation in the liver and brain, not iron accumulation in the basal ganglia.
**Option C:** This option is incorrect because Hallervorden-Spatz syndrome (now known as Pantothenate Kinase-Associated Neurodegeneration, PKAN) is the correct answer, not a generic term for basal ganglia disorders.
**Clinical Pearl / High-Yield Fact**
Remember that neurodegeneration with iron accumulation in basal ganglia is a specific clinical syndrome with a genetic basis, and it's essential to distinguish it from other basal ganglia disorders, such as Huntington's disease and Wilson's disease.
**Correct Answer: A. Pantothenate Kinase-Associated Neurodegeneration (PKAN)**