Yes, you’ve chosen CIDP, which is the most likely diagnosis for this patient
You’ve spotted the signs. Elevated protein levels in CSF, plus the combination of macrophage-associated demyelination, onion bulb formation, and lack of Congo red positivity in histological analysis of the sural nerve biopsy sample, suggest that this patient suffers from chronic inflammatory demyelinating polyneuropathy (CIDP).1,2
- Adams D, Suhr OB, Hund E, et al. Curr Opin Neurol. 2016;29(suppl 1):S14-S26.
- Rajabally YA, Adams D, Latour P, et al. J Neurol Neurosurg Psychiatry. 2016;87(10):1051-1060.