Electrophoresis of CSF showing multiple homogeneous IgG bands by immunofixation is most consistent with which disease?

Electrophoresis of CSF showing multiple homogeneous IgG bands by immunofixation is most consistent with which disease?

• A. Multiple Sclerosis
• B. Guillain-Barré Syndrome
• C. Parkinson Disease
• D. Alzheimer Disease

Answer: (A)

Oligoclonal IgG bands in CSF reflect intrathecal immunoglobulin synthesis, a pattern strongly associated with multiple sclerosis. In MS, B cells within the CNS clonally expand and produce IgG that appears as multiple discrete bands on immunofixation or electrophoresis of CSF, typically with little or no corresponding bands in serum. This intrathecal IgG production is a hallmark of MS and helps distinguish it from other conditions. Guillain-Barré syndrome usually shows elevated CSF protein with normal cell counts and no oligoclonal IgG bands, while Parkinson disease and Alzheimer disease do not display this CSF pattern of intrathecal IgG synthesis. So the finding aligns best with multiple sclerosis.

Oligoclonal IgG bands in CSF reflect intrathecal immunoglobulin synthesis, a pattern strongly associated with multiple sclerosis. In MS, B cells within the CNS clonally expand and produce IgG that appears as multiple discrete bands on immunofixation or electrophoresis of CSF, typically with little or no corresponding bands in serum. This intrathecal IgG production is a hallmark of MS and helps distinguish it from other conditions. Guillain-Barré syndrome usually shows elevated CSF protein with normal cell counts and no oligoclonal IgG bands, while Parkinson disease and Alzheimer disease do not display this CSF pattern of intrathecal IgG synthesis. So the finding aligns best with multiple sclerosis.