Grades palatine tonsil size on the standard 0–4 scale: Grade 0 (tonsillectomy/absent), Grade 1 (<25% of oropharyngeal width), Grade 2 (25–50%), Grade 3 (50–75%), Grade 4 (>75%, "kissing tonsils"). Guides surgical decision-making for pediatric sleep apnea and recurrent tonsillitis.
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