What is the treatment for idiopathic encephalopathy associated with carnitine deficiency? What happens if left untreated?

• A. Antibiotics and hydration.
• B. L-carnitine supplementation with restoration of serum levels; fatalities reported if untreated.
• C. Vitamin B12 injections.
• D. Dietary fat restriction.

Answer: (B)

This scenario tests understanding of a metabolic cause of encephalopathy and how to correct it. The problem is due to a carnitine deficiency that impairs the transport of long-chain fatty acids into mitochondria, reducing the energy available to brain and other organs. Replacing carnitine with L-carnitine supplementation directly addresses this deficit, restoring serum and tissue carnitine levels and re-enabling fatty acid oxidation. As energy production improves, the encephalopathy can improve or stabilize, and long-term outcomes are favorable with treatment. If this deficiency goes untreated, there have been reports of progressive neurological deterioration and even fatalities, reflecting the ongoing energy crisis in vital tissues. Other options don’t target the underlying metabolic defect: antibiotics and hydration treat infections, vitamin B12 injections address B12 deficiency, and dietary fat restriction does not correct carnitine deficiency.