Pharyngomaxillary space abscess is swelling (inflammation) and irritation or pus in the area between the throat and upper jawbone.
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Pappas DE, Boggs SR. Retropharyngeal abscess, lateral pharyngeal (parapharyngeal) abscess, and peritonsillar cellulitis/abscess. In: Kliegman RM, St. Geme JW, Blum NJ, et al, eds. Nelson Textbook of Pediatrics. 22nd ed. Philadelphia, PA: Elsevier; 2025:chap 432.