abscess Retropharyngeal Abscess MESH:D017703 SNOMEDCT:18099001 MedDRA:10038984 Dani Welter An accumulation of purulent material in the space between the PHARYNX and the CERVICAL VERTEBRAE. This usually results from SUPPURATION of retropharyngeal LYMPH NODES in patients with UPPER RESPIRATORY TRACT INFECTIONS, perforation of the pharynx, or head and neck injuries.