Differential Diagnosis for Decreased Vocal Resonance on the Left Side
- Single most likely diagnosis
- Left-sided nasal or sinus pathology (e.g., nasal polyps, deviated septum, or sinusitis): This is the most likely diagnosis because decreased vocal resonance on one side often indicates an obstruction or abnormality in the nasal or sinus passages on that side, which can alter the normal resonance of the voice.
- Other Likely diagnoses
- Left-sided oropharyngeal or hypopharyngeal mass (e.g., tumor or cyst): A mass in the throat can affect vocal resonance by altering the normal anatomy and function of the vocal tract.
- Left-sided vocal cord paralysis or weakness: Although this would more commonly affect vocal quality rather than resonance, significant weakness or paralysis could potentially alter resonance patterns.
- Foreign body in the left nasal passage or throat: An object lodged in the nasal passage or throat could obstruct normal airflow and alter vocal resonance.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- Malignant tumor of the nasal cavity, sinuses, or throat: Although less common, malignant tumors in these areas can cause decreased vocal resonance and are critical to diagnose early due to their potential for severe outcomes.
- Abscess or severe infection of the nasal cavity, sinuses, or throat: Infections in these areas can be life-threatening if not promptly treated, especially if they compromise the airway or lead to sepsis.
- Rare diagnoses
- Congenital anomalies of the nasal cavity or throat (e.g., choanal atresia): These are rare conditions that could potentially cause decreased vocal resonance on one side, especially if they affect the anatomy of the nasal passages or throat.
- Neurological conditions affecting the cranial nerves responsible for vocalization (e.g., stroke, multiple sclerosis): While rare, certain neurological conditions could potentially affect vocal resonance by altering the control over the muscles involved in vocalization.