Infectious mononucleosis and peritonsillar abscess.

A 10-year material of infectious mononucleosis and concomitant peritonsillar abscess from an ENT department has been analysed retrospectively. The incidence of this combination was one per cent among all patients admitted for infectious mononucleosis. Only one patient showed signs of relative upper airway obstruction. All four patients improved shortly after stab incision. In diagnostic considerations and treatment it is important to bear in mind the rare combination of infectious mononucleosis and peritonsillar abscess.