Balo's concentric sclerosis involving bilateral thalami

Balo's concentric sclerosis (BCS) is a rare inflammatory demyelinating disease of central nervous system, pathologically chracterized by alternate bands of demyelination and preserved myelin tissue. Before the era of magnetic resonance imaging (MRI), most cases of BCS were diagnosed on postmortem examination. MRI allows for noninvasive diagnosis by demonstrating characteristic changes which closely parallels the histopathological features of BCS. We report a case of 26-year-old female with BCS involving bilateral thalami, with typical MRI appearance.