Stage IV cancer is characterized by which of the following?

• A. Stage IV: Distant metastasis present.
• B. Stage II: Larger tumour and/or limited nodal involvement, no distant metastasis.
• C. Stage I: Localised, small tumour, no nodal/distant spread.
• D. Stage III: Extensive nodal involvement or locally advanced tumour.

Answer: (A)

Stage IV signifies that the cancer has spread beyond the original organ to distant sites in the body. This distant metastasis—often to organs like the liver, lungs, bones, brain, or distant lymph nodes—is the defining feature that moves a cancer into Stage IV (commonly labeled M1 in TNM terminology).

The other descriptions refer to stages where the disease is still confined to the primary site or regional area: Stage I is localized and small with no nodal or distant spread, Stage II is larger or involves nearby nodes but no distant metastasis, and Stage III involves extensive nodal involvement or locally advanced disease without distant spread. Hence, the presence of distant metastasis is what makes Stage IV the correct characterization.