Parapharyngeal abscess associated with the second pharyngeal pouch.

Peritonsillar or parapharyngeal abscess is not at all a rare disease. Usually the abscess is recognized as the underlying consequence of acute tonsillitis. However, the abscess may be caused by an internal fistula related to the second pharyngeal pouch. Presented here are the clinical, radiological and pathological aspects of an internal fistula with a parapharyngeal abscess related to the second pharyngeal pouch.