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Question: Why does the diagnosis seem to be so delayed in so many cases?

Answer: Cancer cells can multiply to produce literally billions of cells before a tumor becomes big enough to detect or cause symptoms. That is why prevention and some methods of screening are so important. Screening tests help find cancer before a person has symptoms.

(Source: University of Rochester Medical Center, 03 Aug 2025)

Source Link: https://www.urmc.rochester.edu/encyclopedia/content?contenttypeid=35&contentid=FAQGeneralCancer