Which anatomical space is involved when a peritonsillar abscess develops between the tonsillar capsule and the superior pharyngeal constrictor muscle?

Explanation

## Anatomy of Peritonsillar Abscess **Key Point:** A peritonsillar abscess (PTA) develops in the supratonsillar space — the potential space between the tonsillar capsule and the superior pharyngeal constrictor muscle (superior constrictor). ### Anatomical Spaces of the Pharynx | Space | Boundaries | Abscess Type | Clinical Presentation | |-------|-----------|--------------|----------------------| | **Supratonsillar** | Between tonsillar capsule & superior constrictor | Peritonsillar abscess | Soft palate bulge, trismus, dysphagia | | **Intratonsillar** | Within tonsillar parenchyma | Suppurative tonsillitis | Fever, sore throat; precedes PTA | | **Lateral pharyngeal** | Between superior constrictor & stylopharyngeus | Lateral pharyngeal abscess | Neck swelling, "hot potato" voice, risk of vascular involvement | | **Retropharyngeal** | Between pharyngeal wall & alar fascia | Retropharyngeal abscess | Posterior pharyngeal bulge, neck stiffness, airway risk | **High-Yield:** The supratonsillar space is the most common site of abscess formation after acute tonsillitis. The abscess typically bulges the soft palate medially and pushes the lateral pharyngeal wall inward, causing the characteristic "hot potato" voice and dysphagia. **Clinical Pearl:** Peritonsillar abscess is a complication of untreated or inadequately treated acute tonsillitis; it represents localized suppuration in the tonsillar fossa region. Early recognition and drainage (needle aspiration or incision and drainage) prevent progression to deeper neck space infections. **Mnemonic:** **S**upratonsillar = **S**pace between tonsillar capsule and **S**uperior constrictor.