Which procedure uses an endoscope to view the larynx (voice box)?

• A. Laryngoscopy
• B. Lumbar puncture (spinal tap)
• C. Fecal occult blood test
• D. Glucose tolerance test

Answer: (A)

Viewing the larynx with an endoscope is done through laryngoscopy. A laryngoscope—either a flexible fiberoptic tube or a rigid instrument with a light and camera—is inserted through the mouth or nose to illuminate and visualize the vocal cords and surrounding structures. This lets clinicians assess voice changes, throat symptoms, swelling, lesions, or airway problems, and it can guide biopsies or treatments. The other procedures do not involve looking at the throat with an endoscope: a lumbar puncture collects cerebrospinal fluid with a needle; a fecal occult blood test screens for hidden blood in stool; a glucose tolerance test checks how the body handles sugar after a glucose load.