Clinical, nerve conduction and nerve biopsy study in vitamin B12 deficiency neurological syndrome with a short-term follow-up.

Objective: The frequency and type of neuropathy in vitamin B12 deficiency neurological syndrome (VBDNS) is controversial. This study reports the frequency and type of nerve dysfunction in VBDNS using nerve conduction and sural nerve biopsy and its response to treatment.

Method: Sixty-six patients with VBDNS diagnosed on the basis of low serum vitamin B12 level and/or megaloblastic bone marrow were subjected to clinical evaluation, hemoglobin, mean corpuscular volume, thyroid function test, HIV serology, and vasculitic profile.

Quantitative electromyography in dengue-associated muscle dysfunction.

Purpose: This study was undertaken to document the muscle involvement in dengue virus infection using quantitative electromyography (QEMG).

Methods: The patients with dengue myopathy were subjected to clinical examination including muscle power, tone, reflex, and sensations. Blood counts, hemoglobin, hematocrit, serum creatine kinase (CK), and electrolytes were determined.