Signs include Nasal polyps and engorged turbinates A high, narrow arched palate Enlargement of the tongue, tonsils, soft palate, lateral pharyngeal walls, or uvula A small or posteriorly displaced mandible (retrognathia) A modified Mallampati score of 3 or 4 (only the base or none of the uvula is visible during oral inspection—see figure Mallampati scoring) suggests increased risk of OSA.