What diagnostic test is considered definitive for larynx cancer?

• A. x-ray
• B. Biopsy
• C. CT scan
• D. MRI

Answer: (B)

A biopsy is considered the definitive diagnostic test for laryngeal cancer because it involves the removal of a sample of tissue from the larynx, which can then be examined under a microscope for the presence of cancer cells. This direct analysis of tissue allows pathologists to determine not only whether cancer is present, but also to assess the type and grade of the cancer, which are crucial for developing an appropriate treatment plan.

While other imaging techniques like X-rays, CT scans, and MRIs play important roles in the evaluation and staging of laryngeal cancer, they do not provide conclusive evidence of malignancy on their own. X-rays might show abnormalities but are not specific enough for a cancer diagnosis. CT and MRI scans help in visualizing the extent of the disease and any involvement of surrounding structures, but they also cannot confirm the presence of cancer without histological examination through a biopsy. Therefore, the biopsy remains the gold standard for diagnosing laryngeal cancer.