[Retrotonsillar abscess. Diagnosis by flexible endosonography].

A retrotonsillar abscess is a dangerous complication of acute tonsillitis that can be fatal if treatment is delayed. We report the pre-operative findings of flexible endosonography and transcutaneous sonography of a patient with retrotonsillar abscess. The results show, that the new digitally guided, flexible probes of endosonography improve the diagnosis of paratonsillar abscess and are superior to transcutaneous sonography especially for delineating retrotonsillar spread.