Peritonsillar abscess

Alternative names:

abscess - peritonsillar; quinsy

Definition:

A collection of infected material in the area around the tonsils. See also Retropharyngeal abscess.

Causes, incidence, and risk factors:

Peritonsillar abscess is a form of cellulitis that is a complication of tonsillitis. Group A beta-hemolytic streptococcus is usually the cause of peritonsillar abscesses. One or both tonsil(s) becomes infected and pus forms and may spread from the tonsil to the tissues around it. The infection may spread over the roof of the mouth (palate), and to the neck and chest, including the lungs. Swollen tissues may obstruct the airway, which would be a life-threatening medical emergency.

Peritonsillar abscess is generally a disease of older children, adolescents, and young adults. It has become relatively uncommon since the use of antibiotics to treat tonsillitis.