Peritonsillar abscess associated with infectious mononucleosis.

Infectious mononucleosis (IM) is characterized as a viral disease; thus, no antibiotic treatment is recommended. However, some of these patients tend to develop a long-lasting, painful disease, which can be relieved by antibiotic administration. Due to this bed-side knowledge, we re-evaluated 928 patients with peritonsillar abscess (PA), treated during a 5.5-year period in the Department of Otorhinolarygology of Turku University Central Hospital. Of these patients 15 (1.6%) also had infectious mononucleosis (IM). During this period, 64 patients with severe pharyngeal IM were treated in our department and thus the proportion of PA in patients with IM was 23.4%. A control of 15 age- and sex-matched patients with PA but without mononucleosis was formed in order to evaluate the possible differences in patient history, clinical symptoms and findings. Such differences were small and did not affect the chosen treatment of PA, abscess tonsillectomy. There was no peri- or postoperative difference in complications or recovery, but the hospitalization time was longer in IM patients with PA (3.1 days) than in patients with PA only (2.4 days). IM patients referred to ENT departments make a special group of patients, who may also need surgical treatment.