Cancer is one of the most frightening diseases, and hearing such a diagnosis is something everyone fears. But did you know that cancer can have a smell? This is not a myth—it is a scientifically proven fact.
Tumor cells have unique metabolic processes that differ from those of normal cells. These processes can release volatile organic compounds (VOCs) that have distinctive odors. VOCs include substances such as aldehydes, ketones, alcohols, and hydrocarbons. These compounds can sometimes be detected by humans or animals—especially dogs, which are known for their exceptional sense of smell.
Even ancient Greek physicians, including Hippocrates, described cases in which cancer was accompanied by a specific odor. These observations were based on years of medical practice and helped early doctors recognize serious illnesses long before modern diagnostic tools existed.
Modern Research
Recent studies have shown that breast and ovarian tumors can emit odors that can be detected using specialized instruments. In one study, British scientists found that analyzing volatile organic compounds in urine samples may help diagnose bladder cancer.
Cancer does have a smell—and this is not a myth. The odor produced by tumor cells may serve as an important indicator of the disease and could help with early detection. As science continues to advance, smell-based diagnostics may soon become one of the key tools in cancer detection.
