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Peritonsillar Space

spatium periamygdalinum

The peritonsillar space is the potential space between the tonsillar capsule and the superior pharyngeal constrictor muscle, containing loose areolar tissue. Infection in this space produces peritonsillar abscess (quinsy), the most common deep neck space infection in young adults. The space is bilateral and each side communicates with the adjacent parapharyngeal space.

Region: Head & Skull

Clinical Relevance

Clinical Notes

Peritonsillar abscess presents with severe unilateral sore throat, trismus, uvular deviation to the contralateral side, muffled hot-potato voice, and drooling. It most commonly occurs as a complication of untreated streptococcal tonsillitis. Needle aspiration or incision and drainage at the point of maximal fluctuance above the tonsil reduces the collection and is curative in most cases. Recurrent peritonsillar abscess is an indication for interval tonsillectomy. Failure to drain risks parapharyngeal or retropharyngeal spread with potential airway compromise.

Pathology

Common Injuries & Conditions

Peritonsillar Abscess Presenting as Quinsy

Peritonsillar abscess presents with unilateral throat pain, trismus, hot-potato voice, and uvular deviation; incision and drainage or needle aspiration above the superior tonsil pole where the abscess points provides immediate relief, and penicillin treats the underlying streptococcal infection.