NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,812 terms related to cancer and medicine.

Browse the dictionary by selecting a letter of the alphabet or by entering a cancer-related word or phrase in the search box.

stage I prostate cancer
(...PROS-tayt KAN-ser)
Cancer is found in the prostate only. The cancer (1) is found by needle biopsy or in a small amount of tissue during surgery for other reasons; the prostate-specific antigen (PSA) level is lower than 10 and the Gleason score is 6 or lower; or (2) is found in one-half or less of one lobe of the prostate; the PSA level is lower than 10 and the Gleason score is 6 or lower; or (3) cannot be felt during a digital rectal exam and is not visible by imaging; cancer is found in one-half or less of one lobe of the prostate and the PSA level and Gleason score are not known.

EnlargeProstate cancer staging; six  panel drawing showing a side view of normal  male  anatomy and closeup views of Stage I, Stage IIA, Stage IIB, Stage III, and Stage IV  showing cancer growing from within the  prostate to nearby tissue and then to lymph nodes or other parts of the body.

As prostate cancer progresses from Stage I to Stage IV, the cancer cells grow within the prostate, through the outer layer of the prostate into nearby tissue, and then to lymph nodes or other parts of the body.