Peritonsillitis: abscess or cellulitis?

Peritonsillitis encompasses both cellulitis and abscess. To determine the distinguishing factors for cellulitis and abscess, we reviewed 29 patients, 15 with cellulitis and 14 with abscess. Common presenting complaints included dysphagia, trismus, drooling, voice change and fever. Unilateral tonsillar enlargement was usually present, and uvular deviation was noted in 10 of 29 patients. The mean ages of patients with abscess was 15.0 years, and that of patients with cellulitis was 10.8 years. The two groups differed significantly by age (P = 0.02), and discriminant analysis showed age, dysphagia and drooling to be discriminators for abscess patients, while bilaterality or fever were not. Trismus was a discriminator for cellulitis patients. Etiology for abscess included Group A and non-Group A beta-hemolytic streptococci, Group D streptococcus, alpha-streptococcus, anaerobic diphtheroids and coagulase-negative staphylococci. The etiology of the cellulitis was Group A and non-Group A beta-hemolytic streptococci and Streptococcus pneumoniae. Peritonsillitis appeared to increase in frequency. On presentation patients with cellulitis are similar to patients with abscess. Abscess is more likely in adolescents. Recommended therapy is intravenous penicillin and prompt drainage for patients failing to respond.