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The EpiSwitch PSE test is said to be able to detect prostate cancer with 94% accuracy, which the charity called a "significant improvement" on the most commonly used prostate-specific antigen test.

Prostate-specific antigen, or PSA, remains the linchpin of prostate cancer detection.

This is especially valuable because, measures of disease burden, such as prostate-specific antigen levels, become unreliable when a tumor switches its identity to NEPC.

Men aged 55 to 69 or otherwise at risk can be tested for a prostate-specific antigen, a substance made by the prostate.

His doctor ordered a prostate-specific antigen, or P.S.A., test to measure a protein in his blood that might indicate prostate cancer — or a number of more benign conditions.