A rare case of supraglottitis complicated by mediastinitis is presented. Despite aggressive treatment with broadspectrum intravenous antibiotics, the patient persisted to have generalized supraglottitis. Subsequent computed tomography (CT) scanning revealed that she had developed a frank fluid collection starting at the suprasternal notch, extending retrosternally into the superior mediastinum. She recovered with conservative management and did not require aggressive mediastinal drainage as advocated by the literature.