Citrobacter freundii causing pharyngitis and secondary retropharyngeal abscess with intrathoracic extension to the diaphragm: minimally invasive management of a rare case.

Citrobacter freundii is a rare but potentially aggressive cause of pharyngitis which may progress to retropharyngeal abscess with diaphragmatic extension.To raise awareness of: (1) citrobacter as a potential cause of head and neck infection, including retropharyngeal abscess; (2) a novel surgical approach to draining such an abscess; and (3) citrobacter's particular biological properties which may affect the clinical course.Case report.The abscess was drained via a minimally invasive posterior pharyngeal wall incision and placement of a suction catheter into the mediastinum through this incision. Residual intrathoracic collections were drained by the cardiothoracic team via percutaneous aspiration. The patient made a full recovery.Early recognition of citrobacter head and neck infections, an awareness of the peculiarities of the clinical course of such infections, and timely surgical intervention can prevent catastrophic outcomes. A minimally invasive approach to mediastinal collections can be considered as a viable alternative to open thoracotomy, which carries a high morbidity rate.