Bilateral vocal cord paralysis work-up
Screening tests
Serum
electrolytes, calcium/phosphorus, glucose, magnesium, uric acid, liver and thyroid
function tests
CBC, ESR,
ANA, RF, ANCA
RPR, TPHA
Lyme serology
PPD
EMG (laryngeal muscles)
Chest X-ray, US neck
CT scan medulla, neck and superior part mediastinum
Brain
MRI scan (MSA)