. "506" . "retropharynx." . "Retropharyngeal" . . "D017703" . "000984" . "retropharyngeal abscesses" . . "retropharyngeal abscess" . "Retropharyngeal abscess" . . "retropharyngeal" . . "478.24" . . . "11461" . "J39.0" . . . "Retropharyngeal abscess" . . . . . "emerg" . .