TNM Staging system

T stage (extent of primary lesion)

• T1 - tumour confined to prostate, not palpable or visible on TRUS
• T2 - tumour palpable or visible on TRUS but confined to prostate
• T3 - spread beyond the prostatic capsule
• T3a - extracapsular spread only
• T3b - involvement of the seminal vesicles
• T4 - invasion into rectal wall, bladder neck or pelvic wall

N (Nodal) status

• N0 - regional nodes not involved
• N1 - regional nodes involved by tumour

M (Distant Metastases)

• M0 - no distant metastases
• M1 - distant metastases present

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