Use thiamine risk and the CIDP-like neuropathy clue to avoid missing two treatable complications in oncology care. The practical goal is to start the right therapy early instead of attributing everything to chemotherapy alone.

Cancer-related Wernicke encephalopathy reflects thiamine depletion from malnutrition and emetogenic therapy; The classic triad is ophthalmoparesis, ataxia, and confusion; Multiple myeloma can cause a CIDP-like demyelinating neuropathy; Autoimmune encephalitis is often treated with steroids, IVIG, or plasmapheresis; Rituximab and cyclophosphamide are common second-line options