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Danger Space Abscess
Etiology: — Retropharyngeal space extends from skull base to T2 — Danger space is posterior to retropharyngeal space, extends from skull base to diaphragm — Prevertebral space is posterior to danger space, extends from skull base to coccyx — So danger space abscess is deep neck collection extending into mediastinum / below T2
Complications: abscess in danger space can cause descending necrotizing mediastinitis, jugular vein thrombophlebitis / thrombosis, carotid artery rupture, pericarditis / tamponade, bronchial erosion / pyopneumothorax