Unlikely to be definitively diagnosed in ED
CXR
Not sensitive, but good place to start
Barium esophagography
Echocardiography
Bronchoscopy, cardiac catheterization
Not sensitive, but good place to start
Vascular ring
Laryngotracheomalacia
Branchial cleft anomaly
Accounts for 60%
Buccal space infections
Usually exacerbated by viral URI
Ganglion cyst
Dx w/ flexible fiberoptic laryngoscopy