Definition

Peritonsillar abscess is a collection of infected material in the area around the tonsils. See alsoretropharyngeal abscess.

Alternative Names

Quinsy; Abscess - peritonsillar

Causes

Peritonsillar abscess is a complication oftonsillitis. Group A beta-hemolytic streptococcus is usually the cause of peritonsillar abscesses. One or both tonsils 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.

Review Date: 7/30/2003
Reviewed By: Jason Newman, M.D., Department of Otolaryngology, Kaiser Permanente Medical Group, Washington, DC. Review provided by VeriMed Healthcare Network.