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We've been through what 'margins' means at some length. They are NOT the entry points for a laparoscopic prostatectomy. Please go back and read the responses to your previous questions.
Also please note that there is a difference between clinical and pathological staging (I'm pretty sure we've covered that subject too.)
It is not possible for a pathological T3 staging to have negative margins, since the definition a pathological staging T3 is "the tumor has spread through the prostatic capsule (if it is only part-way through, it is still T2)
* T3a: the tumor has spread through the capsule on one or both sides
* T3b: the tumor has invaded one or both seminal vesicles"
Of course a clinical T3 staging could turn out to be a pathological T2 staging
