Malignancies of the respiratory system include which cancers?

• A. Lung cancers and cancer of the larynx.
• B. Liver and pancreatic cancers.
• C. Brain cancers.
• D. Skin cancers.

Answer: (A)

Malignancies of the respiratory system are cancers that arise in structures involved in breathing, mainly the lungs and the larynx. The lungs are the primary site for respiratory cancers, and cancer of the larynx (the voice box) also affects the airway. The other options involve organs not part of the respiratory tract—liver and pancreas are digestive organs, brain is part of the nervous system, and skin is the integumentary system—so they do not represent respiratory-system cancers. Therefore, the cancers included are lung cancers and cancer of the larynx.