STAGE
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SUB-STAGE
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DEFINITION
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T1
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Clinically unapparent tumor, not detected by DRE nor visible by imaging
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T1a
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Incidental histologic finding; <5% of tissue resected during TURP
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T1b
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Incidental histologic finding; >5% of tissue resected during TURP
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T1c
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Tumor identified by needle biopsy due to elevated PSA
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T2
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Confined within the prostate (detectable by DRE, not visible on TRUS)
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T2a
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Tumor involves half of the lobe or less
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T2b
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Tumor involves more than one half of one lobe but not both lobes
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T2c
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Tumor involves both lobes
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T3
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Tumor extends through the prostate capsule but has not spread to other organs
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T3a
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Unilateral extracapsular extension
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T3b
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Bilateral extracapsular extension
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T3c
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Tumor invades seminal vesicle(s)
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T4
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Tumor is fixed or invades adjacent structures other than seminal vesicles
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T4a
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Tumor invades bladder neck and/or external sphincter and/or rectum
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T4b
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Tumor invades levator muscles and/or is fixed to pelvic wall
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