Objectives: To evaluate the relationship between arytenoid adduction asymmetry (AAA) and the demographic and morphological characteristics of true vocal fold (TVF) polyps and establish the cause and effect relationship between AAA and TVF polyps.
Methods: Videolaryngostroboscopic findings of 163 patients with TVF polyps were retrospectively reviewed and categorized into Group 1 with AAA or Group 2 without AAA. Demographic details, clinicomorphological polyp characteristics, supraglottic phenomena, and AAA attributes were analyzed.
Results: Group 1 was younger than Group 2 (fourth vs fifth decade; P = .0066). Polyp characteristics showed no significant intergroup differences. The association between AAA and false vocal fold (FVF) adduction (65.28% vs 47.62% in Group 1 and 2 respectively; P = .0441) was significant. In relation to TVF polyp laterality, contralateral and bilateral AAA and FVF adduction respectively, was significant.
Conclusion: AAA is a compensatory laryngeal adaptation akin to a FVF adduction muscle tension pattern. With a concomitant laryngeal pathology and high vocal demand, AAA is a consequence and not the cause for underlying laryngeal pathology which hinders glottic closure.
Keywords: arytenoid cartilage; glottis/physiopathology; laryngoscopy; muscle tonus; polyps.