Diagnosis of dysphonia in cancer patients typically involves a combination of: 1. Medical History and Physical Examination: Initial assessment by a healthcare provider. 2. Laryngoscopy: A procedure where a scope is used to visualize the vocal cords. 3. Imaging Studies: CT scans, MRI, or PET scans may be used to identify tumors that could be causing dysphonia. 4. Biopsy: If a tumor is detected, a biopsy may be performed to determine if it is cancerous.