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Retropharyngeal abscess. A, Intense erythema and swelling of the posterior pharyngeal wall. B, Lateral neck film showing prominent prevertebral soft tissue swelling that displaces the trachea forward. C, Computed tomography scan with contrast revealing a thick-walled abscess cavity in the retropharyngeal space.
(From Zitelli B, Davis H, eds: The Atlas of Pediatric Physical Diagnosis, 4th ed. Philadelphia: Elsevier, 2002.)
