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6. Determining the cause of hoarseness.

Doctors typically run lab tests, take biopsies and x-rays, and take a complete medical history when they are trying to diagnose the cause of hoarseness. They may ask specific questions about the symptom to get a better idea of the problem. The doctor also may use a laryngoscope, a small lighted instrument that enables the doctor to see the back of your throat. Doctors can discover various problems using these methods, including benign tumors, polypor larynx cancer, vocal cord thickening, the effects of a chemical irritant, and paralysis of the vocal cords.

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