<unk>  fold<unk> s often alter the mechanical properties of the<unk>  folds, which can interfere with their vibratory characteristics.<unk> s may increase the mass of the<unk>  folds, especially along the medial edge where they are typically found. This increased mass may result in aperiodic or irregular vibration, the perception of greater pitch and loudness perturbations, and of increased hoarseness.<unk> s may also affect the mucosal wave of the<unk>  folds by changing the configuration of the<unk>  fold closure pattern. They often cause incomplete closure of the<unk>  folds, resulting in an hourglass configuration. The incomplete closure allows more air to escape through the<unk>  folds, which often results in the perception of breathiness. The degree to which<unk> s will affect the mucosal wave and vibratory characteristics of the<unk>  folds depends highly on the size of the<unk> . Smaller<unk> s may still allow the<unk>  folds to achieve complete closure.
Vocal cord nodule
Colloid nodule
Tracheobronchomegaly
Vocal cord cyst
Ground-glass opacity
Mediastinal lymphadenopathy
Cold nodule
Tracheal agenesis