Final answer:
To limit the spread of cancer in the larynx, a combination of the body's immune response, the structural barriers of the larynx, and treatment methods like chemotherapy are involved. Localized cancer remains in its original location, while regional cancer can spread to nearby lymph nodes and tissues.
Step-by-step explanation:
Limits on the spread of larynx cancer are important to consider in diagnosis and treatment. Localized cancer in the larynx is confined to its original location without evidence of spread, while regional cancer may have extended to nearby lymph nodes or tissues. The larynx, containing cartilage and vocal cords, is a region where cancer can initially develop. Factors limiting the spread include the biological behavior of the cancer cells, the body's immune response, and the barriers provided by the structure of the larynx itself. In cases where cancer has spread, chemotherapy can be a treatment option. An example of effective chemotherapy is the use of cisplatin, which was notably used to treat cyclist Lance Armstrong's metastasized testicular cancer.